diff --git a/.idea/league-manager.iml b/.idea/league-manager.iml
index e221225..a3234c3 100644
--- a/.idea/league-manager.iml
+++ b/.idea/league-manager.iml
@@ -3,8 +3,9 @@
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/backend" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/.venv" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.13" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.14 (RSW_puntensysteem)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="PyDocumentationSettings">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 1d3ce46..5653f38 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,5 +3,5 @@
   <component name="Black">
     <option name="sdkName" value="Python 3.13" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.13" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.14 (RSW_puntensysteem)" project-jdk-type="Python SDK" />
 </project>
\ No newline at end of file
diff --git a/backend/app/models/serie.py b/backend/app/models/serie.py
new file mode 100644
index 0000000..549148b
--- /dev/null
+++ b/backend/app/models/serie.py
@@ -0,0 +1,173 @@
+# app/models/serie.py
+from typing import TYPE_CHECKING
+
+from sqlmodel import Field, Relationship, Session, select
+
+from . import mixin
+from .base import BaseSQLModel, RowId
+from .user import PermissionRight, User
+
+if TYPE_CHECKING:
+    from .team import Team
+
+# region # Serie ##############################################################
+
+# Shared properties
+class SerieUserLinkBase(BaseSQLModel):
+    rights: PermissionRight = Field(default=PermissionRight.READ, nullable=False)
+
+# Properties to receive via API on creation
+class SerieUserLinkCreate(SerieUserLinkBase):
+    user_id: RowId = Field(nullable=False)
+
+# Properties to receive via API on update, all are optional
+class SerieUserLinkUpdate(SerieUserLinkBase):
+    pass
+
+# Database model (link tussen serie en user)
+class SerieUserLink(SerieUserLinkBase, table=True):
+    serie_id: RowId = Field(
+        foreign_key="serie.id",
+        primary_key=True,
+        nullable=False,
+        ondelete="CASCADE",
+    )
+    user_id: RowId = Field(
+        foreign_key="user.id",
+        primary_key=True,
+        nullable=False,
+        ondelete="CASCADE",
+    )
+
+    serie: "Serie" = Relationship(back_populates="user_links")
+    user: "User" = Relationship(back_populates="serie_links")
+
+# Properties to return via API
+class SerieUserLinkPublic(SerieUserLinkBase):
+    user_id: RowId
+    serie_id: RowId
+
+class SerieUserLinksPublic(BaseSQLModel):
+    data: list[SerieUserLinkPublic]
+    count: int
+
+# Shared properties
+class SerieBase(
+    mixin.Name,
+    mixin.Contact,
+    mixin.IsActive,
+    BaseSQLModel,
+):
+    pass
+
+# Properties to receive via API on creation
+class SerieCreate(SerieBase):
+    pass
+
+# Properties to receive via API on update, all are optional
+class SerieUpdate(SerieBase):
+    pass
+
+# Database model
+class Serie(mixin.RowId, SerieBase, table=True):
+
+    user_links: list["SerieUserLink"] = Relationship(back_populates="serie", cascade_delete=True)
+    #teams: list["Team"] = Relationship(back_populates="serie", cascade_delete=True)
+
+    @classmethod
+    def create(cls, *, session: Session, create_obj: SerieCreate) -> "Serie":
+        data_obj = create_obj.model_dump(exclude_unset=True)
+        db_obj = cls.model_validate(data_obj)
+        session.add(db_obj)
+        session.commit()
+        session.refresh(db_obj)
+        return db_obj
+
+    @classmethod
+    def update(cls, *, session: Session, db_obj: "Serie", in_obj: SerieUpdate) -> "Serie":
+        data_obj = in_obj.model_dump(exclude_unset=True)
+        db_obj.sqlmodel_update(data_obj)
+        session.add(db_obj)
+        session.commit()
+        session.refresh(db_obj)
+        return db_obj
+
+    def get_user_link(self, user: User) -> "SerieUserLink | None":
+        return next((link for link in self.user_links if link.user == user), None)
+
+    def add_user(
+        self,
+        user: User,
+        rights: PermissionRight = PermissionRight.READ,
+        *,
+        session: Session,
+    ) -> "SerieUserLink | None":
+        existing = self.get_user_link(user=user)
+        if existing is None:
+            new_link = SerieUserLink(serie=self, user=user, rights=rights)
+            self.user_links.append(new_link)
+            session.add(new_link)
+            session.commit()
+            return new_link
+        return None #TODO aanpassen??
+
+    def update_user(
+        self,
+        user: User,
+        rights: PermissionRight = PermissionRight.READ,
+        *,
+        session: Session,
+    ) -> "SerieUserLink | None":
+        link = self.get_user_link(user=user)
+        if link:
+            link.rights = rights
+            session.add(link)
+            session.commit()
+            return link
+        return None
+
+    def remove_user(self, user: User, *, session: Session) -> None:
+        link = self.get_user_link(user=user)
+        if link:
+            session.delete(link)
+            session.commit()
+
+    def user_has_rights(
+        self,
+        user: User,
+        rights: PermissionRight | None = None,
+    ) -> bool:
+        return any(
+            (
+                link.user == user
+                and link.rights
+                and (not rights or (link.rights & rights) == rights)
+            )
+            for link in self.user_links
+        )
+
+    def user_has_right(
+        self,
+        user: User,
+        rights: PermissionRight | None = None,
+    ) -> bool:
+        return any(
+            (
+                link.user == user
+                and link.rights
+                and (not rights or (link.rights & rights))
+            )
+            for link in self.user_links
+        )
+
+
+# API output models
+class SeriePublic(mixin.RowIdPublic, SerieBase):
+    pass
+
+
+class SeriesPublic(BaseSQLModel):
+    data: list[SeriePublic]
+    count: int
+
+# endregion
\ No newline at end of file