diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/DivaController.kt b/src/main/java/icu/samnyan/aqua/sega/diva/DivaController.kt
index efd29756..f6ec55e3 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/DivaController.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/DivaController.kt
@@ -1,5 +1,6 @@
 package icu.samnyan.aqua.sega.diva
 
+import ext.JDict
 import ext.MutJDict
 import ext.logger
 import icu.samnyan.aqua.sega.diva.handler.AttendHandler
@@ -84,6 +85,10 @@ class DivaController(
     val logger = logger()
     val mapper = DivaMapper()
 
+    fun buildResultMap(map: JDict) =
+        map.filterValues { it != null && !(it is String && it == "") }
+            .map { (k, v) -> "$k=$v" }.joinToString("&")
+
     @PostMapping(value = ["/"], consumes = [MediaType.APPLICATION_FORM_URLENCODED_VALUE])
     fun formRequest(request: HttpServletRequest): String? {
         val bodyStr = String(request.inputStream.readAllBytes())
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/BaseHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/BaseHandler.kt
deleted file mode 100644
index 0ff9cbab..00000000
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/BaseHandler.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-package icu.samnyan.aqua.sega.diva.handler
-
-import ext.JDict
-import icu.samnyan.aqua.sega.diva.util.DivaMapper
-import org.springframework.stereotype.Component
-
-fun buildResultMap(map: JDict) =
-    map.filterValues { it != null && !(it is String && it == "") }
-        .map { (k, v) -> "$k=$v" }.joinToString("&")
-
-/**
- * @author samnyan (privateamusement@protonmail.com)
- */
-@Component
-class BaseHandler {
-    @JvmField
-    final var mapper = DivaMapper()
-
-    fun build(map: JDict) = buildResultMap(map)
-}
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/InitHandlers.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/InitHandlers.kt
index baf75240..921a4f41 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/InitHandlers.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/InitHandlers.kt
@@ -1,6 +1,5 @@
 package icu.samnyan.aqua.sega.diva.handler
 
-import ext.logger
 import icu.samnyan.aqua.sega.diva.model.common.attend.DispersalParameter
 import icu.samnyan.aqua.sega.diva.model.common.attend.EtcParameter
 import icu.samnyan.aqua.sega.diva.model.common.attend.GameBalanceParameter
@@ -41,9 +40,7 @@ class AttendHandler {
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PingHandler(val rp: PropertyEntryRepository) : BaseHandler() {
-    val logger = logger()
-
+class PingHandler(val rp: PropertyEntryRepository) {
     fun handle(request: BaseRequest): Any {
         val news: PropertyEntry = rp.findByPropertyKey("diva_news") ?: PropertyEntry("diva_news", "xxx")
         val warning: PropertyEntry = rp.findByPropertyKey("diva_warning") ?: PropertyEntry("diva_warning", "xxx")
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerDataHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerDataHandler.kt
index cbd77b5e..b6d53b1b 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerDataHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerDataHandler.kt
@@ -10,7 +10,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class BannerDataHandler : BaseHandler() {
+class BannerDataHandler {
     fun handle(request: BannerDataRequest) = BannerDataResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerInfoHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerInfoHandler.kt
index c15e341e..6f3cc53b 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerInfoHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/BannerInfoHandler.kt
@@ -9,7 +9,7 @@ import org.springframework.stereotype.Component
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class BannerInfoHandler : BaseHandler() {
+class BannerInfoHandler {
     fun handle(request: BaseRequest) = BannerInfoResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CmPlyInfoHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CmPlyInfoHandler.kt
index 8aa8522f..7e223d23 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CmPlyInfoHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CmPlyInfoHandler.kt
@@ -9,7 +9,7 @@ import org.springframework.stereotype.Component
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class CmPlyInfoHandler : BaseHandler() {
+class CmPlyInfoHandler {
     fun handle(request: BaseRequest) = BaseResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ContestInfoHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ContestInfoHandler.kt
index 6040c15f..6af6f1a5 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ContestInfoHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ContestInfoHandler.kt
@@ -15,7 +15,7 @@ import kotlin.math.max
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class ContestInfoHandler(private val contestRepository: ContestRepository) : BaseHandler() {
+class ContestInfoHandler(private val contestRepository: ContestRepository) {
     fun handle(request: BaseRequest): Any {
         val contestList = contestRepository.findTop8ByEnable(true)
         var ci_str = "***"
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmCtlgHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmCtlgHandler.kt
index 404700d4..a7015fa0 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmCtlgHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmCtlgHandler.kt
@@ -13,7 +13,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class CstmzItmCtlgHandler(private val customizeRepository: DivaCustomizeRepository) : BaseHandler() {
+class CstmzItmCtlgHandler(private val customizeRepository: DivaCustomizeRepository) {
     fun handle(request: BaseRequest): Any {
         val customizeList = customizeRepository.findAll()
 
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmNgMdlListHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmNgMdlListHandler.kt
index f3b1a174..d3c3cfe8 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmNgMdlListHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/CstmzItmNgMdlListHandler.kt
@@ -11,7 +11,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class CstmzItmNgMdlListHandler : BaseHandler() {
+class CstmzItmNgMdlListHandler {
     fun handle(request: BaseRequest) = CstmzItmNgMdlListResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/FestaInfoHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/FestaInfoHandler.kt
index 5bfd777c..16c524a6 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/FestaInfoHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/FestaInfoHandler.kt
@@ -11,7 +11,7 @@ import org.springframework.stereotype.Component
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class FestaInfoHandler(private val festaRepository: FestaRepository) : BaseHandler() {
+class FestaInfoHandler(private val festaRepository: FestaRepository) {
     fun handle(request: BaseRequest): Any {
         val festaList = festaRepository.findTop2ByEnableOrderByCreateDateDesc(true)
         val collection = FestaCollection(festaList)
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NgWordHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NgWordHandler.kt
index 892ec9ec..30766ae3 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NgWordHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NgWordHandler.kt
@@ -9,7 +9,7 @@ import org.springframework.stereotype.Component
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class NgWordHandler : BaseHandler() {
+class NgWordHandler {
     fun handle(request: BaseRequest) = BaseResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NvRankingHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NvRankingHandler.kt
index e3068e51..30743e0b 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NvRankingHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/NvRankingHandler.kt
@@ -9,7 +9,7 @@ import org.springframework.stereotype.Component
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class NvRankingHandler : BaseHandler() {
+class NvRankingHandler {
     fun handle(request: BaseRequest) = NvRankingResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PsRankingHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PsRankingHandler.kt
index 4cb5e282..cb82ffda 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PsRankingHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PsRankingHandler.kt
@@ -17,7 +17,7 @@ import java.util.stream.Collectors
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PsRankingHandler(private val playerPvRecordRepository: PlayerPvRecordRepository) : BaseHandler() {
+class PsRankingHandler(private val playerPvRecordRepository: PlayerPvRecordRepository) {
     fun handle(request: PsRankingRequest): Any {
         var edition = Edition.ORIGINAL
         var difficulty = Difficulty.HARD
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdHCtrlHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdHCtrlHandler.kt
index 1ef639eb..21666fc9 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdHCtrlHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdHCtrlHandler.kt
@@ -13,7 +13,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PstdHCtrlHandler : BaseHandler() {
+class PstdHCtrlHandler {
     fun handle(request: BaseRequest) = PstdHCtrlResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdItemNgLstHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdItemNgLstHandler.kt
index 27655a91..03267b11 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdItemNgLstHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PstdItemNgLstHandler.kt
@@ -11,7 +11,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PstdItemNgLstHandler : BaseHandler() {
+class PstdItemNgLstHandler {
     fun handle(request: BaseRequest) = PstdItemNgLstResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvDefChrLstHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvDefChrLstHandler.kt
index 95872f43..a1eb88b3 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvDefChrLstHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvDefChrLstHandler.kt
@@ -13,7 +13,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PvDefChrLstHandler : BaseHandler() {
+class PvDefChrLstHandler {
     fun handle(request: BaseRequest) = PvDefChrLstResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvListHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvListHandler.kt
index c805f1f9..41bf401f 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvListHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvListHandler.kt
@@ -16,7 +16,7 @@ import java.util.function.Consumer
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PvListHandler(private val pvEntryRepository: PvEntryRepository) : BaseHandler() {
+class PvListHandler(private val pvEntryRepository: PvEntryRepository) {
     private val df: DateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd")
 
     fun handle(request: BaseRequest): Any {
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvNgMdlLstHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvNgMdlLstHandler.kt
index fcbd76c8..bc783e62 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvNgMdlLstHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/PvNgMdlLstHandler.kt
@@ -11,7 +11,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class PvNgMdlLstHandler : BaseHandler() {
+class PvNgMdlLstHandler {
     fun handle(request: BaseRequest) = PvNgMdlLstResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/QstInfHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/QstInfHandler.kt
index 1f13b2ad..37af31da 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/QstInfHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/QstInfHandler.kt
@@ -11,7 +11,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class QstInfHandler : BaseHandler() {
+class QstInfHandler {
     fun handle(request: BaseRequest) = QstInfResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/RmtWpLstHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/RmtWpLstHandler.kt
index a7aa2ea5..59c07544 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/RmtWpLstHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/RmtWpLstHandler.kt
@@ -11,7 +11,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class RmtWpLstHandler : BaseHandler() {
+class RmtWpLstHandler {
     fun handle(request: BaseRequest) = RmtWpLstResponse(
         request.cmd,
         request.req_id,
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ShopCatalogHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ShopCatalogHandler.kt
index 94cfc3a4..dedcb3d1 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ShopCatalogHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/databank/ShopCatalogHandler.kt
@@ -12,7 +12,7 @@ import java.time.LocalDateTime
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class ShopCatalogHandler(private val moduleRepository: DivaModuleRepository) : BaseHandler() {
+class ShopCatalogHandler(private val moduleRepository: DivaModuleRepository) {
     fun handle(request: BaseRequest): Any {
         val moduleList = moduleRepository.findAll()
 
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyCstmzItmHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyCstmzItmHandler.kt
index bf9716df..ead88833 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyCstmzItmHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyCstmzItmHandler.kt
@@ -23,7 +23,7 @@ class BuyCstmzItmHandler(
     private val playerProfileService: PlayerProfileService,
     private val playerCustomizeService: PlayerCustomizeService,
     private val gameSessionRepository: GameSessionRepository
-) : BaseHandler() {
+) {
     fun handle(request: BuyCstmzItmRequest): Any {
         val profile = playerProfileService.findByPdId(request.pd_id).orElseThrow(
             Supplier { ProfileNotFoundException() })
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyModuleHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyModuleHandler.kt
index db788088..aa260bef 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyModuleHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/BuyModuleHandler.kt
@@ -23,7 +23,7 @@ class BuyModuleHandler(
     private val playerProfileService: PlayerProfileService,
     private val playerModuleService: PlayerModuleService,
     private val gameSessionRepository: GameSessionRepository
-) : BaseHandler() {
+) {
     fun handle(request: BuyModuleRequest): Any {
         val profile = playerProfileService.findByPdId(request.pd_id).orElseThrow<ProfileNotFoundException?>(
             Supplier { ProfileNotFoundException() })
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/GetPvPdHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/GetPvPdHandler.kt
index e58e223e..e84c9685 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/GetPvPdHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/GetPvPdHandler.kt
@@ -24,7 +24,7 @@ class GetPvPdHandler(
     private val pvRecordRepository: PlayerPvRecordRepository,
     private val pvCustomizeRepository: PlayerPvCustomizeRepository,
     private val playerProfileService: PlayerProfileService
-) : BaseHandler() {
+) {
     fun handle(request: GetPvPdRequest): Any {
         val profileO = playerProfileService.findByPdId(request.pd_id)
         val pd = StringBuilder()
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/ShopExitHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/ShopExitHandler.kt
index 1332435f..342cde21 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/ShopExitHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/ShopExitHandler.kt
@@ -19,7 +19,7 @@ import java.util.function.Supplier
 class ShopExitHandler(
     private val playerProfileService: PlayerProfileService,
     private val pvCustomizeRepository: PlayerPvCustomizeRepository
-) : BaseHandler() {
+) {
     fun handle(request: ShopExitRequest): Any {
         val profile = playerProfileService.findByPdId(request.pd_id).orElseThrow<ProfileNotFoundException?>(
             Supplier { ProfileNotFoundException() })
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageResultHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageResultHandler.kt
index 29253ec1..586e6d07 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageResultHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageResultHandler.kt
@@ -44,7 +44,7 @@ class StageResultHandler(
     private val playerCustomizeRepository: PlayerCustomizeRepository,
     private val playerInventoryRepository: PlayerInventoryRepository,
     private val divaCalculator: DivaCalculator
-) : BaseHandler() {
+) {
     private var currentProfile: PlayerProfile? = null
     val logger = logger()
 
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageStartHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageStartHandler.kt
index 44054c1c..a729d5e6 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageStartHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StageStartHandler.kt
@@ -18,7 +18,7 @@ import java.util.function.Supplier
 class StageStartHandler(
     private val gameSessionRepository: GameSessionRepository,
     private val playerProfileService: PlayerProfileService
-) : BaseHandler() {
+) {
     fun handle(request: StageStartRequest): Any {
         if (request.getPd_id() != -1L) {
             val profile = playerProfileService.findByPdId(request.getPd_id()).orElseThrow<ProfileNotFoundException?>(
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StoreSsHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StoreSsHandler.kt
index cebbd06a..1d79d208 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StoreSsHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/ingame/StoreSsHandler.kt
@@ -25,7 +25,7 @@ import java.util.function.Supplier
 class StoreSsHandler(
     private val playerProfileService: PlayerProfileService,
     private val screenShotRepository: PlayerScreenShotRepository
-) : BaseHandler() {
+) {
     val logger = logger()
     fun handle(request: StoreSsRequest, file: MultipartFile): Any {
         val profile = playerProfileService.findByPdId(request.pd_id).orElseThrow<ProfileNotFoundException?>(
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/EndHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/EndHandler.kt
index d3dba350..5ab6d4b2 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/EndHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/EndHandler.kt
@@ -33,7 +33,7 @@ class EndHandler(
     private val playerProfileService: PlayerProfileService,
     private val playerContestRepository: PlayerContestRepository,
     private val gameSessionRepository: GameSessionRepository
-) : BaseHandler() {
+) {
     fun handle(request: StageResultRequest): Any {
         val profile = playerProfileService.findByPdId(request.getPd_id()).orElseThrow<ProfileNotFoundException?>(
             Supplier { ProfileNotFoundException() })
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PdUnlockHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PdUnlockHandler.kt
index ed358540..a0f1daeb 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PdUnlockHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PdUnlockHandler.kt
@@ -17,7 +17,7 @@ import java.util.function.Supplier
 class PdUnlockHandler(
     private val playerProfileService: PlayerProfileService,
     private val gameSessionRepository: GameSessionRepository
-) : BaseHandler() {
+) {
     fun handle(request: PdUnlockRequest): Any {
         val profile = playerProfileService.findByPdId(request.pd_id).orElseThrow<ProfileNotFoundException?>(
             Supplier { ProfileNotFoundException() })
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PreStartHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PreStartHandler.kt
index 69771d6e..5cdebb30 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PreStartHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/PreStartHandler.kt
@@ -20,7 +20,7 @@ import java.util.concurrent.ThreadLocalRandom
 class PreStartHandler(
     private val playerProfileService: PlayerProfileService,
     private val gameSessionRepository: GameSessionRepository
-) : BaseHandler() {
+) {
     var logger = logger()
     fun handle(request: PreStartRequest): Any {
         val profileOptional = playerProfileService.findByPdId(request.aime_id)
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/SpendCreditHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/SpendCreditHandler.kt
index a18a8592..8b1498ea 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/SpendCreditHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/SpendCreditHandler.kt
@@ -12,7 +12,7 @@ import java.util.function.Supplier
  * @author samnyan (privateamusement@protonmail.com)
  */
 @Component
-class SpendCreditHandler(private val playerProfileService: PlayerProfileService) : BaseHandler() {
+class SpendCreditHandler(private val playerProfileService: PlayerProfileService) {
     fun handle(request: SpendCreditRequest): Any {
         val profile = playerProfileService.findByPdId(request.pd_id).orElseThrow<ProfileNotFoundException?>(
             Supplier { ProfileNotFoundException() })
diff --git a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/StartHandler.kt b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/StartHandler.kt
index bb552fd5..c032f07f 100644
--- a/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/StartHandler.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/diva/handler/user/StartHandler.kt
@@ -1,7 +1,8 @@
 package icu.samnyan.aqua.sega.diva.handler.user
 
-import icu.samnyan.aqua.sega.diva.*
-import icu.samnyan.aqua.sega.diva.handler.BaseHandler
+import icu.samnyan.aqua.sega.diva.GameSessionRepository
+import icu.samnyan.aqua.sega.diva.PlayerContestRepository
+import icu.samnyan.aqua.sega.diva.PlayerPvRecordRepository
 import icu.samnyan.aqua.sega.diva.model.common.*
 import icu.samnyan.aqua.sega.diva.model.common.collection.ClearSet
 import icu.samnyan.aqua.sega.diva.model.common.collection.ClearTally
@@ -35,7 +36,7 @@ class StartHandler(
     private val playerModuleService: PlayerModuleService,
     private val playerPvRecordRepository: PlayerPvRecordRepository,
     private val playerContestRepository: PlayerContestRepository
-) : BaseHandler() {
+) {
     fun handle(request: StartRequest): Any {
         val profile = playerProfileService.findByPdId(request.getPd_id()).orElseThrow<ProfileNotFoundException>(
             Supplier { ProfileNotFoundException() })