diff --git a/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/impl/GetUserItemHandler.java b/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/impl/GetUserItemHandler.java
deleted file mode 100644
index 9c87e2e4..00000000
--- a/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/impl/GetUserItemHandler.java
+++ /dev/null
@@ -1,59 +0,0 @@
-package icu.samnyan.aqua.sega.maimai2.handler.impl;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import icu.samnyan.aqua.sega.maimai2.model.Mai2UserItemRepo;
-import icu.samnyan.aqua.sega.maimai2.handler.BaseHandler;
-import icu.samnyan.aqua.sega.maimai2.model.userdata.UserItem;
-import icu.samnyan.aqua.sega.util.jackson.BasicMapper;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.data.domain.Page;
-import org.springframework.data.domain.PageRequest;
-import org.springframework.stereotype.Component;
-
-import java.util.LinkedHashMap;
-import java.util.Map;
-
-/**
- * @author samnyan (privateamusement@protonmail.com)
- */
-@Component("Maimai2GetUserItemHandler")
-public class GetUserItemHandler implements BaseHandler {
-
-    private static final Logger logger = LoggerFactory.getLogger(GetUserItemHandler.class);
-
-    private final BasicMapper mapper;
-
-    private final Mai2UserItemRepo userItemRepository;
-
-    public GetUserItemHandler(BasicMapper mapper, Mai2UserItemRepo userItemRepository) {
-        this.mapper = mapper;
-        this.userItemRepository = userItemRepository;
-    }
-
-    @Override
-    public String handle(Map<String, Object> request) throws JsonProcessingException {
-        long userId = ((Number) request.get("userId")).longValue();
-        long nextIndexVal = ((Number) request.get("nextIndex")).longValue();
-        int maxCount = ((Number) request.get("maxCount")).intValue();
-
-        long mul = 10000000000L;
-
-        int kind = (int) (nextIndexVal / mul);
-        int nextIndex = (int) (nextIndexVal % mul);
-        int pageNum = nextIndex / maxCount;
-
-        Page<UserItem> dbPage = userItemRepository.findByUser_Card_ExtIdAndItemKind(userId, kind, PageRequest.of(pageNum, maxCount));
-
-        long currentIndex = kind * mul + maxCount * pageNum + dbPage.getNumberOfElements();
-        Map<String, Object> resultMap = new LinkedHashMap<>();
-        resultMap.put("userId", userId);
-        resultMap.put("nextIndex", dbPage.getNumberOfElements() < maxCount ? 0 : currentIndex);
-        resultMap.put("itemKind", kind);
-        resultMap.put("userItemList", dbPage.getContent());
-
-        String json = mapper.write(resultMap);
-        logger.info("Response: " + json);
-        return json;
-    }
-}
diff --git a/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/impl/GetUserItemHandler.kt b/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/impl/GetUserItemHandler.kt
new file mode 100644
index 00000000..a0d18993
--- /dev/null
+++ b/src/main/java/icu/samnyan/aqua/sega/maimai2/handler/impl/GetUserItemHandler.kt
@@ -0,0 +1,69 @@
+package icu.samnyan.aqua.sega.maimai2.handler.impl
+
+import ext.JSON
+import icu.samnyan.aqua.net.games.Maimai2
+import icu.samnyan.aqua.sega.maimai2.handler.BaseHandler
+import icu.samnyan.aqua.sega.maimai2.model.Mai2Repos
+import icu.samnyan.aqua.sega.maimai2.model.userdata.UserItem
+import kotlinx.serialization.encodeToString
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import org.springframework.data.domain.PageRequest
+import org.springframework.stereotype.Component
+
+/**
+ * @author samnyan (privateamusement@protonmail.com)
+ */
+@Component("Maimai2GetUserItemHandler")
+class GetUserItemHandler(
+    val repos: Mai2Repos,
+    val maimai2: Maimai2
+) : BaseHandler {
+    val musicUnlock = (5..8).associateWith { kind ->
+        JSON.encodeToString(maimai2.musicMapping.mapKeys { UserItem().apply {
+            itemKind = kind
+            itemId = it.key
+            stock = 1
+        } }) }
+
+    override fun handle(request: Map<String, Any>): Any {
+        val userId = request["userId"] as Long
+        val nextIndexVal = request["nextIndex"] as Long
+        val maxCount = request["maxCount"] as Int
+
+        val kind = (nextIndexVal / MULT).toInt()
+        val nextIndex = (nextIndexVal % MULT).toInt()
+        val pageNum = nextIndex / maxCount
+
+        // All Music unlock TODO: Check user settings
+        if (kind in 5..8) {
+            logger.info("Response: ${maimai2.musicMapping.size} items - Music unlock")
+            return mapOf(
+                "userId" to userId,
+                "nextIndex" to 0,
+                "itemKind" to kind,
+                "userItemList" to musicUnlock.getValue(kind)
+            )
+        }
+
+        //
+
+        val dbPage = repos.userItem.findByUser_Card_ExtIdAndItemKind(userId, kind, PageRequest.of(pageNum, maxCount))
+
+        val currentIndex = kind * MULT + maxCount * pageNum + dbPage.numberOfElements
+        val result = mapOf(
+            "userId" to userId,
+            "nextIndex" to if (dbPage.numberOfElements < maxCount) 0 else currentIndex,
+            "itemKind" to kind,
+            "userItemList" to dbPage.content
+        )
+
+        logger.info("Response: ${dbPage.numberOfElements} items")
+        return result
+    }
+
+    companion object {
+        val logger: Logger = LoggerFactory.getLogger(GetUserItemHandler::class.java)
+        const val MULT = 10000000000L
+    }
+}
diff --git a/src/main/java/icu/samnyan/aqua/sega/maimai2/model/userdata/UserItem.java b/src/main/java/icu/samnyan/aqua/sega/maimai2/model/userdata/UserItem.java
index 68966b96..d2fcd9d0 100644
--- a/src/main/java/icu/samnyan/aqua/sega/maimai2/model/userdata/UserItem.java
+++ b/src/main/java/icu/samnyan/aqua/sega/maimai2/model/userdata/UserItem.java
@@ -39,4 +39,16 @@ public class UserItem implements Serializable {
     public UserItem(UserDetail user) {
         this.user = user;
     }
+
+    public static final int KIND_NAMEPLATE = 1;
+    public static final int KIND_TITLE = 2;
+    public static final int KIND_ICON = 3;
+    public static final int KIND_MUSIC_UNLOCK = 5;
+    public static final int KIND_MUSIC_MASTER_UNLOCK = 6;
+    public static final int KIND_MUSIC_REMASTER_UNLOCK = 7;
+    public static final int KIND_MUSIC_STRONG_UNLOCK = 8;
+    public static final int KIND_CHARACTER = 9;
+    public static final int KIND_PARTNER = 10;
+    public static final int KIND_FRAME = 11;
+    public static final int KIND_TICKETS = 12;
 }