diff --git a/internal/store/mysql.go b/internal/store/mysql.go
index 58ea615..ba7aa15 100644
--- a/internal/store/mysql.go
+++ b/internal/store/mysql.go
@@ -114,26 +114,18 @@ type tenantDBConfig struct {
 	State  int    `db:"state"`
 }
 
-// ForTenant returns a Store connected to the tenant database configured by manager/hotgo.
+// ForTenant returns a tenant-scoped Store over the configured shared database.
 func (s *Store) ForTenant(ctx context.Context, tenantID int64, tenantCode string) (*Store, error) {
 	if s == nil {
 		return nil, errors.New("store is nil")
 	}
-	if tenantID <= 0 && strings.TrimSpace(tenantCode) == "" {
-		return s, nil
-	}
-	cfg, err := s.tenantDBConfig(ctx, tenantID, tenantCode)
-	if err != nil {
-		return nil, err
-	}
-	if cfg.State != 1 {
-		return nil, fmt.Errorf("tenant disabled: id=%d code=%s", cfg.ID, cfg.Code)
-	}
-	cacheID := cfg.ID
+	_ = ctx
+	_ = tenantCode
+	cacheID := tenantID
 	if cacheID <= 0 {
-		cacheID = tenantID
+		cacheID = defaultTenantID
 	}
-	if s.tenantID == cacheID {
+	if cacheID == s.tenant() {
 		return s, nil
 	}
 	s.tenantStoreMu.Lock()
@@ -141,34 +133,7 @@ func (s *Store) ForTenant(ctx context.Context, tenantID int64, tenantCode string
 		s.tenantStoreMu.Unlock()
 		return st, nil
 	}
-	s.tenantStoreMu.Unlock()
-
-	dsn, err := tenantDSN(s.dsn, cfg.DBName, cfg.DBDSN)
-	if err != nil {
-		return nil, err
-	}
-	if dsn == "" || dsn == s.dsn {
-		st := &Store{db: s.db, dsn: s.dsn, tenantID: cacheID}
-		s.tenantStoreMu.Lock()
-		if existing := s.tenantStores[cacheID]; existing != nil {
-			s.tenantStoreMu.Unlock()
-			return existing, nil
-		}
-		s.tenantStores[cacheID] = st
-		s.tenantStoreMu.Unlock()
-		return st, nil
-	}
-	st, err := openDSN(dsn)
-	if err != nil {
-		return nil, err
-	}
-	st.tenantID = cacheID
-	s.tenantStoreMu.Lock()
-	if existing := s.tenantStores[cacheID]; existing != nil {
-		s.tenantStoreMu.Unlock()
-		_ = st.Close()
-		return existing, nil
-	}
+	st := &Store{db: s.db, dsn: s.dsn, tenantID: cacheID}
 	s.tenantStores[cacheID] = st
 	s.tenantStoreMu.Unlock()
 	return st, nil