diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml
index 159fe3145..5f12f27bb 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml
@@ -8,5 +8,13 @@ spec:
 
   port: 3306
 
+  volumeClaimTemplate:
+    resources:
+      requests:
+        storage: 5Gi
+    storageClassName: synology-iscsi-storage-temp
+    accessModes:
+      - ReadWriteOnce
+
   service:
     type: ClusterIP
diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/synology-csi-storageclass/storageclass.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/synology-csi-storageclass/storageclass.yaml
index f4cb015c2..1a74ec5dc 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/synology-csi-storageclass/storageclass.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/synology-csi-storageclass/storageclass.yaml
@@ -12,3 +12,18 @@ parameters:
   formatOptions: '--nodiscard'
 reclaimPolicy: Retain
 allowVolumeExpansion: true
+---
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: synology-iscsi-storage-temp
+  annotations:
+    storageclass.kubernetes.io/is-default-class: "true"
+provisioner: csi.san.synology.com
+parameters:
+  dsm: '192.168.16.240'
+  location: '/volume1'
+  csi.storage.k8s.io/fstype: 'btrfs'
+  formatOptions: '--nodiscard'
+reclaimPolicy: Delete
+allowVolumeExpansion: true