diff --git a/packages/frontend/assets/room/objects/blind/blind.blend b/packages/frontend/assets/room/objects/blind/blind.blend
index a6a8520516..9ea245f6ec 100644
Binary files a/packages/frontend/assets/room/objects/blind/blind.blend and b/packages/frontend/assets/room/objects/blind/blind.blend differ
diff --git a/packages/frontend/assets/room/objects/blind/blind.glb b/packages/frontend/assets/room/objects/blind/blind.glb
index 415094397e..61b148f5ef 100644
Binary files a/packages/frontend/assets/room/objects/blind/blind.glb and b/packages/frontend/assets/room/objects/blind/blind.glb differ
diff --git a/packages/frontend/src/pages/room.vue b/packages/frontend/src/pages/room.vue
index 3b1d5c806d..08f1e50c7f 100644
--- a/packages/frontend/src/pages/room.vue
+++ b/packages/frontend/src/pages/room.vue
@@ -18,22 +18,32 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkButton v-if="engine.enableGridSnapping.value" :primary="engine.gridSnappingScale.value === 8" @click="engine.gridSnappingScale.value = 8">Snap: 8cm</MkButton>
 		</template>
 		<MkButton v-if="engine.isSitting.value" @click="engine.standUp()">降りる (Q)</MkButton>
+		<template v-for="interaction in interacions" :key="interaction.id">
+			<MkButton @click="interaction.fn()">{{ interaction.label }}</MkButton>
+		</template>
 	</div>
 </div>
 </template>
 
 <script lang="ts" setup>
-import { defineAsyncComponent, onMounted, onUnmounted, ref, shallowRef, useTemplateRef } from 'vue';
+import { defineAsyncComponent, onMounted, onUnmounted, ref, shallowRef, useTemplateRef, watch } from 'vue';
 import { definePage } from '@/page.js';
 import { i18n } from '@/i18n.js';
 import { ensureSignin } from '@/i';
 import MkButton from '@/components/MkButton.vue';
 import { RoomEngine } from '@/utility/room/engine.js';
+import { getObjectDef } from '@/utility/room/object-defs.js';
 
 const canvas = useTemplateRef('canvas');
 
 const engine = shallowRef<RoomEngine | null>(null);
 
+const interacions = shallowRef<{
+	id: string;
+	label: string;
+	fn: () => void;
+}[]>([]);
+
 function resize() {
 	if (engine.value != null) engine.value.resize();
 }
@@ -276,6 +286,20 @@ onMounted(() => {
 	canvas.value!.focus();
 
 	window.addEventListener('resize', resize);
+
+	watch(engine.value.selectedObjectId, (v) => {
+		if (v == null) {
+			interacions.value = [];
+		} else {
+			const o = engine.value.def.objects.find(o => o.id === v)!;
+			const obji = engine.value.objectInstances.get(o.id)!;
+			interacions.value = Object.entries(obji.interactions).map(([interactionId, interactionInfo]) => ({
+				id: interactionId,
+				label: interactionInfo.label,
+				fn: interactionInfo.fn,
+			}));
+		}
+	});
 });
 
 onUnmounted(() => {
diff --git a/packages/frontend/src/utility/room/engine.ts b/packages/frontend/src/utility/room/engine.ts
index e0b9d1d7c8..eb951a6f6c 100644
--- a/packages/frontend/src/utility/room/engine.ts
+++ b/packages/frontend/src/utility/room/engine.ts
@@ -22,7 +22,7 @@ import { BoundingBoxRenderer } from '@babylonjs/core/Rendering/boundingBoxRender
 import { GridMaterial } from '@babylonjs/materials';
 import { ShowInspector } from '@babylonjs/inspector';
 import { ref, watch } from 'vue';
-import { OBJECT_DEFS } from './object-defs.js';
+import { getObjectDef, OBJECT_DEFS } from './object-defs.js';
 import * as sound from '@/utility/sound.js';
 
 type RoomSettingObject<Options = any> = {
@@ -339,14 +339,6 @@ const OBJECTS = {
 	},
 };
 
-function getObjectDef(type: string): typeof OBJECT_DEFS[number] {
-	const def = OBJECT_DEFS.find(x => x.id === type);
-	if (def == null) {
-		throw new Error(`Unrecognized object type: ${type}`);
-	}
-	return def;
-}
-
 const _assumedFramesPerSecond = 60;
 
 class HorizontalCameraKeyboardMoveInput extends BABYLON.BaseCameraPointersInput {
@@ -476,7 +468,7 @@ export class RoomEngine {
 	private intervalIds: number[] = [];
 	private timeoutIds: number[] = [];
 	private objectMeshs: Map<string, BABYLON.Mesh> = new Map();
-	private objectInstances: Map<string, RoomObjectInstance<any>> = new Map();
+	public objectInstances: Map<string, RoomObjectInstance<any>> = new Map();
 	private grabbing: {
 		objectId: string;
 		mesh: BABYLON.Mesh;
@@ -488,10 +480,10 @@ export class RoomEngine {
 		descendantStickyObjectIds: string[];
 		isMainLight: boolean;
 	} | null = null;
-	private selectedObjectId: string | null = null;
+	public selectedObjectId = ref<string | null>(null);
 	private time: 0 | 1 | 2 = 2; // 0: 昼, 1: 夕, 2: 夜
 	private roomCollisionMeshes: BABYLON.AbstractMesh[] = [];
-	private def: RoomSetting;
+	public def: RoomSetting;
 	public enableGridSnapping = ref(true);
 	public gridSnappingScale = ref(8/*cm*/);
 	private putParticleSystem: BABYLON.ParticleSystem;
@@ -755,8 +747,8 @@ export class RoomEngine {
 				ev.stopPropagation();
 				if (this.isEditMode.value) {
 					this.toggleGrab();
-				} else if (this.selectedObjectId != null) {
-					this.interact(this.selectedObjectId);
+				} else if (this.selectedObjectId.value != null) {
+					this.interact(this.selectedObjectId.value);
 				}
 			} else if (ev.code === 'KeyR') {
 				ev.preventDefault();
@@ -869,14 +861,14 @@ export class RoomEngine {
 	}
 
 	public selectObject(objectId: string | null) {
-		if (this.selectedObjectId != null) {
-			const prevMesh = this.objectMeshs.get(this.selectedObjectId);
+		if (this.selectedObjectId.value != null) {
+			const prevMesh = this.objectMeshs.get(this.selectedObjectId.value);
 			if (prevMesh != null) {
 				for (const om of prevMesh.getChildMeshes()) {
 					om.renderOutline = false;
 				}
 			}
-			this.selectedObjectId = null;
+			this.selectedObjectId.value = null;
 		}
 
 		if (objectId != null) {
@@ -885,7 +877,7 @@ export class RoomEngine {
 				for (const om of mesh.getChildMeshes()) {
 					om.renderOutline = true;
 				}
-				this.selectedObjectId = objectId;
+				this.selectedObjectId.value = objectId;
 			}
 		}
 	}
@@ -1250,9 +1242,9 @@ export class RoomEngine {
 			return;
 		}
 
-		if (this.selectedObjectId == null) return;
+		if (this.selectedObjectId.value == null) return;
 
-		const selectedObject = this.objectMeshs.get(this.selectedObjectId)!;
+		const selectedObject = this.objectMeshs.get(this.selectedObjectId.value)!;
 		for (const om of selectedObject.getChildMeshes()) {
 			om.renderOutline = false;
 		}
diff --git a/packages/frontend/src/utility/room/object-defs.ts b/packages/frontend/src/utility/room/object-defs.ts
index 66a792f1ec..baf9543401 100644
--- a/packages/frontend/src/utility/room/object-defs.ts
+++ b/packages/frontend/src/utility/room/object-defs.ts
@@ -8,3 +8,11 @@ import { blind } from './objects/blind.js';
 export const OBJECT_DEFS = [
 	blind,
 ];
+
+export function getObjectDef(type: string): typeof OBJECT_DEFS[number] {
+	const def = OBJECT_DEFS.find(x => x.id === type);
+	if (def == null) {
+		throw new Error(`Unrecognized object type: ${type}`);
+	}
+	return def;
+}
diff --git a/packages/frontend/src/utility/room/objects/blind.ts b/packages/frontend/src/utility/room/objects/blind.ts
index 911cf98907..18d241e99f 100644
--- a/packages/frontend/src/utility/room/objects/blind.ts
+++ b/packages/frontend/src/utility/room/objects/blind.ts
@@ -54,8 +54,8 @@ export const blind = defineObject({
 				adjustBladeRotation: {
 					label: 'Adjust blade rotation',
 					fn: () => {
-						o.options.angle += Math.PI / 24;
-						if (o.options.angle > Math.PI / 2) o.options.angle = 0;
+						o.options.angle += Math.PI / 8;
+						if (o.options.angle >= Math.PI / 2) o.options.angle = -Math.PI / 2;
 						applyAngle();
 					},
 				},