diff --git a/app/database/__init__.py b/app/database/__init__.py
index 12fa867..6e2e8c5 100644
--- a/app/database/__init__.py
+++ b/app/database/__init__.py
@@ -10,6 +10,7 @@ from .beatmapset import (
 )
 from .best_score import BestScore
 from .daily_challenge import DailyChallengeStats, DailyChallengeStatsResp
+from .favourite_beatmapset import FavouriteBeatmapset
 from .lazer_user import (
     User,
     UserResp,
@@ -41,6 +42,7 @@ __all__ = [
     "BestScore",
     "DailyChallengeStats",
     "DailyChallengeStatsResp",
+    "FavouriteBeatmapset",
     "OAuthToken",
     "PPBestScore",
     "Relationship",
diff --git a/app/database/beatmap.py b/app/database/beatmap.py
index 2ab5ad0..c55643a 100644
--- a/app/database/beatmap.py
+++ b/app/database/beatmap.py
@@ -14,6 +14,8 @@ from sqlmodel.ext.asyncio.session import AsyncSession
 if TYPE_CHECKING:
     from app.fetcher import Fetcher
 
+    from .lazer_user import User
+
 
 class BeatmapOwner(SQLModel):
     id: int
@@ -161,6 +163,8 @@ class BeatmapResp(BeatmapBase):
         beatmap: Beatmap,
         query_mode: GameMode | None = None,
         from_set: bool = False,
+        session: AsyncSession | None = None,
+        user: "User | None" = None,
     ) -> "BeatmapResp":
         beatmap_ = beatmap.model_dump()
         if query_mode is not None and beatmap.mode != query_mode:
@@ -170,5 +174,7 @@ class BeatmapResp(BeatmapBase):
         beatmap_["ranked"] = beatmap.beatmap_status.value
         beatmap_["mode_int"] = MODE_TO_INT[beatmap.mode]
         if not from_set:
-            beatmap_["beatmapset"] = await BeatmapsetResp.from_db(beatmap.beatmapset)
+            beatmap_["beatmapset"] = await BeatmapsetResp.from_db(
+                beatmap.beatmapset, session=session, user=user
+            )
         return cls.model_validate(beatmap_)
diff --git a/app/database/beatmapset.py b/app/database/beatmapset.py
index 5a618b7..49313b2 100644
--- a/app/database/beatmapset.py
+++ b/app/database/beatmapset.py
@@ -5,14 +5,17 @@ from app.models.beatmap import BeatmapRankStatus, Genre, Language
 from app.models.model import UTCBaseModel
 from app.models.score import GameMode
 
+from .lazer_user import BASE_INCLUDES, User, UserResp
+
 from pydantic import BaseModel, model_serializer
 from sqlalchemy import DECIMAL, JSON, Column, DateTime, Text
 from sqlalchemy.ext.asyncio import AsyncAttrs
-from sqlmodel import Field, Relationship, SQLModel
+from sqlmodel import Field, Relationship, SQLModel, col, func, select
 from sqlmodel.ext.asyncio.session import AsyncSession
 
 if TYPE_CHECKING:
     from .beatmap import Beatmap, BeatmapResp
+    from .favourite_beatmapset import FavouriteBeatmapset
 
 
 class BeatmapCovers(SQLModel):
@@ -90,7 +93,6 @@ class BeatmapsetBase(SQLModel, UTCBaseModel):
     artist_unicode: str = Field(index=True)
     covers: BeatmapCovers | None = Field(sa_column=Column(JSON))
     creator: str
-    favourite_count: int
     nsfw: bool = Field(default=False)
     play_count: int
     preview_url: str
@@ -114,11 +116,9 @@ class BeatmapsetBase(SQLModel, UTCBaseModel):
 
     pack_tags: list[str] = Field(default=[], sa_column=Column(JSON))
     ratings: list[int] = Field(default=None, sa_column=Column(JSON))
-    # TODO: recent_favourites: Optional[list[User]] = None
     # TODO: related_users: Optional[list[User]] = None
     # TODO: user: Optional[User] = Field(default=None)
     track_id: int | None = Field(default=None)  # feature artist?
-    # TODO: has_favourited
 
     # BeatmapsetExtended
     bpm: float = Field(default=0.0, sa_column=Column(DECIMAL(10, 2)))
@@ -152,6 +152,7 @@ class Beatmapset(AsyncAttrs, BeatmapsetBase, table=True):
     hype_required: int = Field(default=0)
     availability_info: str | None = Field(default=None)
     download_disabled: bool = Field(default=False)
+    favourites: list["FavouriteBeatmapset"] = Relationship(back_populates="beatmapset")
 
     @classmethod
     async def from_resp(
@@ -199,40 +200,88 @@ class BeatmapsetResp(BeatmapsetBase):
     genre: BeatmapTranslationText | None = None
     language: BeatmapTranslationText | None = None
     nominations: BeatmapNominations | None = None
+    has_favourited: bool = False
+    favourite_count: int = 0
+    recent_favourites: list[UserResp] = Field(default_factory=list)
 
     @classmethod
-    async def from_db(cls, beatmapset: Beatmapset) -> "BeatmapsetResp":
+    async def from_db(
+        cls,
+        beatmapset: Beatmapset,
+        include: list[str] = [],
+        session: AsyncSession | None = None,
+        user: User | None = None,
+    ) -> "BeatmapsetResp":
         from .beatmap import BeatmapResp
+        from .favourite_beatmapset import FavouriteBeatmapset
 
-        beatmaps = [
-            await BeatmapResp.from_db(beatmap, from_set=True)
-            for beatmap in await beatmapset.awaitable_attrs.beatmaps
-        ]
+        update = {
+            "beatmaps": [
+                await BeatmapResp.from_db(beatmap, from_set=True)
+                for beatmap in await beatmapset.awaitable_attrs.beatmaps
+            ],
+            "hype": BeatmapHype(
+                current=beatmapset.hype_current, required=beatmapset.hype_required
+            ),
+            "availability": BeatmapAvailability(
+                more_information=beatmapset.availability_info,
+                download_disabled=beatmapset.download_disabled,
+            ),
+            "genre": BeatmapTranslationText(
+                name=beatmapset.beatmap_genre.name,
+                id=beatmapset.beatmap_genre.value,
+            ),
+            "language": BeatmapTranslationText(
+                name=beatmapset.beatmap_language.name,
+                id=beatmapset.beatmap_language.value,
+            ),
+            "nominations": BeatmapNominations(
+                required=beatmapset.nominations_required,
+                current=beatmapset.nominations_current,
+            ),
+            "status": beatmapset.beatmap_status.name.lower(),
+            "ranked": beatmapset.beatmap_status.value,
+            "is_scoreable": beatmapset.beatmap_status > BeatmapRankStatus.PENDING,
+            **beatmapset.model_dump(),
+        }
+        if session and user:
+            existing_favourite = (
+                await session.exec(
+                    select(FavouriteBeatmapset).where(
+                        FavouriteBeatmapset.beatmapset_id == beatmapset.id
+                    )
+                )
+            ).first()
+            update["has_favourited"] = existing_favourite is not None
+
+        if session and "recent_favourites" in include:
+            recent_favourites = (
+                await session.exec(
+                    select(FavouriteBeatmapset)
+                    .where(
+                        FavouriteBeatmapset.beatmapset_id == beatmapset.id,
+                    )
+                    .order_by(col(FavouriteBeatmapset.date).desc())
+                    .limit(50)
+                )
+            ).all()
+            update["recent_favourites"] = [
+                await UserResp.from_db(
+                    await favourite.awaitable_attrs.user,
+                    session=session,
+                    include=BASE_INCLUDES,
+                )
+                for favourite in recent_favourites
+            ]
+
+        if session:
+            update["favourite_count"] = (
+                await session.exec(
+                    select(func.count())
+                    .select_from(FavouriteBeatmapset)
+                    .where(FavouriteBeatmapset.beatmapset_id == beatmapset.id)
+                )
+            ).one()
         return cls.model_validate(
-            {
-                "beatmaps": beatmaps,
-                "hype": BeatmapHype(
-                    current=beatmapset.hype_current, required=beatmapset.hype_required
-                ),
-                "availability": BeatmapAvailability(
-                    more_information=beatmapset.availability_info,
-                    download_disabled=beatmapset.download_disabled,
-                ),
-                "genre": BeatmapTranslationText(
-                    name=beatmapset.beatmap_genre.name,
-                    id=beatmapset.beatmap_genre.value,
-                ),
-                "language": BeatmapTranslationText(
-                    name=beatmapset.beatmap_language.name,
-                    id=beatmapset.beatmap_language.value,
-                ),
-                "nominations": BeatmapNominations(
-                    required=beatmapset.nominations_required,
-                    current=beatmapset.nominations_current,
-                ),
-                "status": beatmapset.beatmap_status.name.lower(),
-                "ranked": beatmapset.beatmap_status.value,
-                "is_scoreable": beatmapset.beatmap_status > BeatmapRankStatus.PENDING,
-                **beatmapset.model_dump(),
-            }
+            update,
         )
diff --git a/app/database/favourite_beatmapset.py b/app/database/favourite_beatmapset.py
new file mode 100644
index 0000000..51bd578
--- /dev/null
+++ b/app/database/favourite_beatmapset.py
@@ -0,0 +1,53 @@
+import datetime
+
+from app.database.beatmapset import Beatmapset
+from app.database.lazer_user import User
+
+from sqlalchemy.ext.asyncio import AsyncAttrs
+from sqlmodel import (
+    BigInteger,
+    Column,
+    DateTime,
+    Field,
+    ForeignKey,
+    Relationship,
+    SQLModel,
+)
+
+
+class FavouriteBeatmapset(AsyncAttrs, SQLModel, table=True):
+    __tablename__ = "favourite_beatmapset"  # pyright: ignore[reportAssignmentType]
+    id: int | None = Field(
+        default=None,
+        sa_column=Column(BigInteger, autoincrement=True, primary_key=True),
+        exclude=True,
+    )
+    user_id: int = Field(
+        default=None,
+        sa_column=Column(
+            BigInteger,
+            ForeignKey("lazer_users.id"),
+            index=True,
+        ),
+    )
+    beatmapset_id: int = Field(
+        default=None,
+        sa_column=Column(
+            ForeignKey("beatmapsets.id"),
+            index=True,
+        ),
+    )
+    date: datetime.datetime = Field(
+        default=datetime.datetime.now(datetime.UTC),
+        sa_column=Column(
+            DateTime,
+        ),
+    )
+
+    user: User = Relationship(back_populates="favourite_beatmapsets")
+    beatmapset: Beatmapset = Relationship(
+        sa_relationship_kwargs={
+            "lazy": "selectin",
+        },
+        back_populates="favourites",
+    )
diff --git a/app/database/lazer_user.py b/app/database/lazer_user.py
index 1337cc2..3bd751b 100644
--- a/app/database/lazer_user.py
+++ b/app/database/lazer_user.py
@@ -1,7 +1,6 @@
 from datetime import UTC, datetime
 from typing import TYPE_CHECKING, NotRequired, TypedDict
 
-from app.dependencies.database import get_redis
 from app.models.model import UTCBaseModel
 from app.models.score import GameMode
 from app.models.user import Country, Page, RankHistory
@@ -28,7 +27,8 @@ from sqlmodel import (
 from sqlmodel.ext.asyncio.session import AsyncSession
 
 if TYPE_CHECKING:
-    from app.database.relationship import RelationshipResp
+    from .favourite_beatmapset import FavouriteBeatmapset
+    from .relationship import RelationshipResp
 
 
 class Kudosu(TypedDict):
@@ -144,6 +144,9 @@ class User(AsyncAttrs, UserBase, table=True):
         back_populates="user"
     )
     monthly_playcounts: list[MonthlyPlaycounts] = Relationship(back_populates="user")
+    favourite_beatmapsets: list["FavouriteBeatmapset"] = Relationship(
+        back_populates="user"
+    )
 
     email: str = Field(max_length=254, unique=True, index=True, exclude=True)
     priv: int = Field(default=1, exclude=True)
@@ -201,6 +204,8 @@ class UserResp(UserBase):
         include: list[str] = [],
         ruleset: GameMode | None = None,
     ) -> "UserResp":
+        from app.dependencies.database import get_redis
+
         from .best_score import BestScore
         from .relationship import Relationship, RelationshipResp, RelationshipType
 
@@ -320,3 +325,9 @@ SEARCH_INCLUDED = [
     "achievements",
     "monthly_playcounts",
 ]
+
+BASE_INCLUDES = [
+    "team",
+    "daily_challenge_user_stats",
+    "statistics",
+]
diff --git a/app/database/score.py b/app/database/score.py
index 32ddb6c..79cb005 100644
--- a/app/database/score.py
+++ b/app/database/score.py
@@ -169,7 +169,9 @@ class ScoreResp(ScoreBase):
         assert score.id
         await score.awaitable_attrs.beatmap
         s.beatmap = await BeatmapResp.from_db(score.beatmap)
-        s.beatmapset = await BeatmapsetResp.from_db(score.beatmap.beatmapset)
+        s.beatmapset = await BeatmapsetResp.from_db(
+            score.beatmap.beatmapset, session=session, user=score.user
+        )
         s.is_perfect_combo = s.max_combo == s.beatmap.max_combo
         s.legacy_perfect = s.max_combo == s.beatmap.max_combo
         s.ruleset_id = MODE_TO_INT[score.gamemode]
@@ -669,7 +671,7 @@ async def process_score(
                 acc=score.accuracy,
             )
             session.add(best_score)
-            session.delete(previous_pp_best) if previous_pp_best else None
+            await session.delete(previous_pp_best) if previous_pp_best else None
             await session.commit()
             await session.refresh(score)
     await session.refresh(score_token)
diff --git a/app/router/beatmap.py b/app/router/beatmap.py
index 0a25562..9574bdb 100644
--- a/app/router/beatmap.py
+++ b/app/router/beatmap.py
@@ -50,7 +50,7 @@ async def lookup_beatmap(
     if beatmap is None:
         raise HTTPException(status_code=404, detail="Beatmap not found")
 
-    return await BeatmapResp.from_db(beatmap)
+    return await BeatmapResp.from_db(beatmap, session=db, user=current_user)
 
 
 @router.get("/beatmaps/{bid}", tags=["beatmap"], response_model=BeatmapResp)
@@ -62,7 +62,7 @@ async def get_beatmap(
 ):
     try:
         beatmap = await Beatmap.get_or_fetch(db, fetcher, bid)
-        return await BeatmapResp.from_db(beatmap)
+        return await BeatmapResp.from_db(beatmap, session=db, user=current_user)
     except HTTPError:
         raise HTTPException(status_code=404, detail="Beatmap not found")
 
@@ -90,7 +90,12 @@ async def batch_get_beatmaps(
             await db.exec(select(Beatmap).where(col(Beatmap.id).in_(b_ids)).limit(50))
         ).all()
 
-    return BatchGetResp(beatmaps=[await BeatmapResp.from_db(bm) for bm in beatmaps])
+    return BatchGetResp(
+        beatmaps=[
+            await BeatmapResp.from_db(bm, session=db, user=current_user)
+            for bm in beatmaps
+        ]
+    )
 
 
 @router.post(
diff --git a/app/router/beatmapset.py b/app/router/beatmapset.py
index b82678d..b4d2e4c 100644
--- a/app/router/beatmapset.py
+++ b/app/router/beatmapset.py
@@ -1,10 +1,8 @@
 from __future__ import annotations
 
-from app.database import (
-    Beatmapset,
-    BeatmapsetResp,
-    User,
-)
+from typing import Literal
+
+from app.database import Beatmapset, BeatmapsetResp, FavouriteBeatmapset, User
 from app.dependencies.database import get_db
 from app.dependencies.fetcher import get_fetcher
 from app.dependencies.user import get_current_user
@@ -12,7 +10,7 @@ from app.fetcher import Fetcher
 
 from .api_router import router
 
-from fastapi import Depends, HTTPException, Query
+from fastapi import Depends, Form, HTTPException, Query
 from fastapi.responses import RedirectResponse
 from httpx import HTTPStatusError
 from sqlmodel import select
@@ -34,7 +32,9 @@ async def get_beatmapset(
         except HTTPStatusError:
             raise HTTPException(status_code=404, detail="Beatmapset not found")
     else:
-        resp = await BeatmapsetResp.from_db(beatmapset)
+        resp = await BeatmapsetResp.from_db(
+            beatmapset, session=db, include=["recent_favourites"], user=current_user
+        )
     return resp
 
 
@@ -53,3 +53,34 @@ async def download_beatmapset(
         return RedirectResponse(
             f"https://api.nerinyan.moe/d/{beatmapset}?noVideo={no_video}"
         )
+
+
+@router.post("/beatmapsets/{beatmapset}/favourites", tags=["beatmapset"])
+async def favourite_beatmapset(
+    beatmapset: int,
+    action: Literal["favourite", "unfavourite"] = Form(),
+    current_user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    existing_favourite = (
+        await db.exec(
+            select(FavouriteBeatmapset).where(
+                FavouriteBeatmapset.user_id == current_user.id,
+                FavouriteBeatmapset.beatmapset_id == beatmapset,
+            )
+        )
+    ).first()
+
+    if action == "favourite" and existing_favourite:
+        raise HTTPException(status_code=400, detail="Already favourited")
+    elif action == "unfavourite" and not existing_favourite:
+        raise HTTPException(status_code=400, detail="Not favourited")
+
+    if action == "favourite":
+        favourite = FavouriteBeatmapset(
+            user_id=current_user.id, beatmapset_id=beatmapset
+        )
+        db.add(favourite)
+    else:
+        await db.delete(existing_favourite)
+    await db.commit()
diff --git a/migrations/versions/1178d0758ebf_beatmapset_support_favourite_count.py b/migrations/versions/1178d0758ebf_beatmapset_support_favourite_count.py
new file mode 100644
index 0000000..84bae15
--- /dev/null
+++ b/migrations/versions/1178d0758ebf_beatmapset_support_favourite_count.py
@@ -0,0 +1,40 @@
+"""beatmapset: support favourite count
+
+Revision ID: 1178d0758ebf
+Revises:
+Create Date: 2025-08-01 04:05:09.882800
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = "1178d0758ebf"
+down_revision: str | Sequence[str] | None = None
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column("beatmapsets", "favourite_count")
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column(
+        "beatmapsets",
+        sa.Column(
+            "favourite_count", mysql.INTEGER(), autoincrement=False, nullable=False
+        ),
+    )
+    # ### end Alembic commands ###