diff --git a/apps/stage-tamagotchi/src/renderer/src/pages/settings/providers/elevenlabs.vue b/apps/stage-tamagotchi/src/renderer/src/pages/settings/providers/elevenlabs.vue
index ef4d30f91..75c6134e3 100644
--- a/apps/stage-tamagotchi/src/renderer/src/pages/settings/providers/elevenlabs.vue
+++ b/apps/stage-tamagotchi/src/renderer/src/pages/settings/providers/elevenlabs.vue
@@ -13,6 +13,7 @@ import {
   ProviderBasicSettings,
   ProviderSettingsContainer,
   ProviderSettingsLayout,
+  TestDummyMarker,
 } from '@proj-airi/stage-ui/components'
 import { voiceMap } from '@proj-airi/stage-ui/constants'
 import { useProvidersStore, useSpeechStore } from '@proj-airi/stage-ui/stores'
@@ -310,9 +311,14 @@ function handleResetVoiceSettings() {
       </ProviderSettingsContainer>
 
       <div flex="~ col gap-6" class="w-full md:w-[60%]">
-        <div rounded-xl>
-          <h2 class="mb-4 text-lg text-neutral-500 md:text-2xl dark:text-neutral-400">
-            {{ t('settings.pages.providers.provider.elevenlabs.playground.title') }}
+        <div w-full rounded-xl>
+          <h2 class="mb-4 text-lg text-neutral-500 md:text-2xl dark:text-neutral-400" w-full>
+            <div class="inline-flex items-center gap-4">
+              <TestDummyMarker />
+              <div>
+                {{ t('settings.pages.providers.provider.elevenlabs.playground.title') }}
+              </div>
+            </div>
           </h2>
           <div flex="~ col gap-4">
             <textarea
diff --git a/apps/stage-web/src/pages/settings/providers/elevenlabs.vue b/apps/stage-web/src/pages/settings/providers/elevenlabs.vue
index ef4d30f91..75c6134e3 100644
--- a/apps/stage-web/src/pages/settings/providers/elevenlabs.vue
+++ b/apps/stage-web/src/pages/settings/providers/elevenlabs.vue
@@ -13,6 +13,7 @@ import {
   ProviderBasicSettings,
   ProviderSettingsContainer,
   ProviderSettingsLayout,
+  TestDummyMarker,
 } from '@proj-airi/stage-ui/components'
 import { voiceMap } from '@proj-airi/stage-ui/constants'
 import { useProvidersStore, useSpeechStore } from '@proj-airi/stage-ui/stores'
@@ -310,9 +311,14 @@ function handleResetVoiceSettings() {
       </ProviderSettingsContainer>
 
       <div flex="~ col gap-6" class="w-full md:w-[60%]">
-        <div rounded-xl>
-          <h2 class="mb-4 text-lg text-neutral-500 md:text-2xl dark:text-neutral-400">
-            {{ t('settings.pages.providers.provider.elevenlabs.playground.title') }}
+        <div w-full rounded-xl>
+          <h2 class="mb-4 text-lg text-neutral-500 md:text-2xl dark:text-neutral-400" w-full>
+            <div class="inline-flex items-center gap-4">
+              <TestDummyMarker />
+              <div>
+                {{ t('settings.pages.providers.provider.elevenlabs.playground.title') }}
+              </div>
+            </div>
           </h2>
           <div flex="~ col gap-4">
             <textarea
diff --git a/packages/stage-ui/histoire.config.ts b/packages/stage-ui/histoire.config.ts
index ded227b4b..18c20db1d 100644
--- a/packages/stage-ui/histoire.config.ts
+++ b/packages/stage-ui/histoire.config.ts
@@ -16,18 +16,30 @@ export default defineConfig({
         id: 'design-system',
         title: 'Design System',
       },
-      {
-        id: 'menu',
-        title: 'Menu',
-      },
       {
         id: 'form',
         title: 'Form',
       },
+      {
+        id: 'menu',
+        title: 'Menu',
+      },
       {
         id: 'providers',
         title: 'Providers',
       },
+      {
+        id: 'physics',
+        title: 'Physics',
+      },
+      {
+        id: 'graphics',
+        title: 'Graphics',
+      },
+      {
+        id: 'gadgets',
+        title: 'Gadgets',
+      },
       {
         id: 'data-gui',
         title: 'Data GUI',
diff --git a/packages/stage-ui/src/components/Gadgets/TestDummyMarker.story.vue b/packages/stage-ui/src/components/Gadgets/TestDummyMarker.story.vue
new file mode 100644
index 000000000..373848653
--- /dev/null
+++ b/packages/stage-ui/src/components/Gadgets/TestDummyMarker.story.vue
@@ -0,0 +1,87 @@
+<script setup lang="ts">
+import Volumed from '../Graphics/Volumed.vue'
+import CursorMomentum from '../Physics/CursorMomentum.vue'
+import TestDummyMarker from './TestDummyMarker.vue'
+import TestDummyMarkerFlat from './TestDummyMarkerFlat.vue'
+</script>
+
+<template>
+  <Story
+    title="Test Dummy Marker"
+    group="gadgets"
+    :layout="{ type: 'grid', width: 600 }"
+  >
+    <template #controls>
+      <ThemeColorsHueControl />
+    </template>
+
+    <Variant
+      id="flat"
+      title="Flat Version"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <TestDummyMarkerFlat :size="40" />
+      </div>
+    </Variant>
+
+    <Variant
+      id="3d-basic"
+      title="3D Basic"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <Volumed :perspective="800">
+          <TestDummyMarkerFlat :size="40" />
+        </Volumed>
+      </div>
+    </Variant>
+
+    <Variant
+      id="3d-tilted"
+      title="3D Tilted"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <Volumed
+          :perspective="800"
+          transform="rotateX(45deg)"
+        >
+          <TestDummyMarkerFlat :size="40" />
+        </Volumed>
+      </div>
+    </Variant>
+
+    <Variant
+      id="with-momentum"
+      title="With Cursor Momentum"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <CursorMomentum
+          v-slot="{ currentValue }"
+          :base-speed="0.1"
+          :friction="0.95"
+          :momentum-factor="0.005"
+        >
+          <Volumed
+            :perspective="800"
+            transform="rotateX(45deg)"
+          >
+            <TestDummyMarkerFlat
+              :size="40"
+              :style="{
+                transform: `rotate(${currentValue}deg)`,
+              }"
+            />
+          </Volumed>
+        </CursorMomentum>
+      </div>
+    </Variant>
+
+    <Variant
+      id="original"
+      title="Original Implementation"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <TestDummyMarker :size="40" />
+      </div>
+    </Variant>
+  </Story>
+</template>
diff --git a/packages/stage-ui/src/components/Gadgets/TestDummyMarker.vue b/packages/stage-ui/src/components/Gadgets/TestDummyMarker.vue
new file mode 100644
index 000000000..8d57d047c
--- /dev/null
+++ b/packages/stage-ui/src/components/Gadgets/TestDummyMarker.vue
@@ -0,0 +1,13 @@
+<script setup lang="ts">
+import Volumed from '../Graphics/Volumed.vue'
+import CursorMomentum from '../Physics/CursorMomentum.vue'
+import TestDummyMarkerFlat from './TestDummyMarkerFlat.vue'
+</script>
+
+<template>
+  <CursorMomentum v-slot="{ currentValue }" :base-speed="0.1" :friction="0.95" :momentum-factor="0.0005">
+    <Volumed :perspective="800" transform="rotateX(45deg) translateY(3px)">
+      <TestDummyMarkerFlat :size="24" :style="{ transform: `rotate(${currentValue}deg)` }" />
+    </Volumed>
+  </CursorMomentum>
+</template>
diff --git a/packages/stage-ui/src/components/Gadgets/TestDummyMarkerFlat.vue b/packages/stage-ui/src/components/Gadgets/TestDummyMarkerFlat.vue
new file mode 100644
index 000000000..18799ee1b
--- /dev/null
+++ b/packages/stage-ui/src/components/Gadgets/TestDummyMarkerFlat.vue
@@ -0,0 +1,36 @@
+<script setup lang="ts">
+defineProps<{
+  size?: number
+}>()
+</script>
+
+<template>
+  <div
+    class="test-dummy-flat"
+    :style="{
+      width: `${size}px`,
+      height: `${size}px`,
+    }"
+  >
+    <div class="marker" />
+  </div>
+</template>
+
+<style scoped>
+.test-dummy-flat {
+  display: inline-block;
+  position: relative;
+}
+
+.test-dummy-flat .marker {
+  position: absolute;
+  inset: 0;
+  background: conic-gradient(#ffeb3b 0deg 90deg, #000 90deg 180deg, #ffeb3b 180deg 270deg, #000 270deg 360deg);
+  border-radius: 50%;
+  box-shadow: 0 4px 12px rgba(185, 185, 185, 0.2);
+}
+
+.dark .test-dummy-flat .marker {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+}
+</style>
diff --git a/packages/stage-ui/src/components/Gadgets/index.ts b/packages/stage-ui/src/components/Gadgets/index.ts
new file mode 100644
index 000000000..6e1e98984
--- /dev/null
+++ b/packages/stage-ui/src/components/Gadgets/index.ts
@@ -0,0 +1 @@
+export { default as TestDummyMarker } from './TestDummyMarker.vue'
diff --git a/packages/stage-ui/src/components/Graphics/Volumed.story.vue b/packages/stage-ui/src/components/Graphics/Volumed.story.vue
new file mode 100644
index 000000000..3bb37d7ce
--- /dev/null
+++ b/packages/stage-ui/src/components/Graphics/Volumed.story.vue
@@ -0,0 +1,53 @@
+<script setup lang="ts">
+import Volumed from './Volumed.vue'
+</script>
+
+<template>
+  <Story
+    title="Volumed"
+    group="graphics"
+    :layout="{ type: 'grid', width: 600 }"
+  >
+    <template #controls>
+      <ThemeColorsHueControl />
+    </template>
+
+    <Variant
+      id="basic"
+      title="Basic 3D"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <Volumed :perspective="800">
+          <div class="bg-primary-500/20 h-20 w-20" />
+        </Volumed>
+      </div>
+    </Variant>
+
+    <Variant
+      id="rotated"
+      title="Rotated"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <Volumed
+          :perspective="800"
+          transform="rotateX(45deg) rotateY(45deg)"
+        >
+          <div class="bg-primary-500/20 h-20 w-20" />
+        </Volumed>
+      </div>
+    </Variant>
+
+    <Variant
+      id="nested"
+      title="Nested 3D"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <Volumed :perspective="800">
+          <Volumed transform="rotateX(45deg)">
+            <div class="bg-primary-500/20 h-20 w-20" />
+          </Volumed>
+        </Volumed>
+      </div>
+    </Variant>
+  </Story>
+</template>
diff --git a/packages/stage-ui/src/components/Graphics/Volumed.vue b/packages/stage-ui/src/components/Graphics/Volumed.vue
new file mode 100644
index 000000000..2193a35e0
--- /dev/null
+++ b/packages/stage-ui/src/components/Graphics/Volumed.vue
@@ -0,0 +1,26 @@
+<script setup lang="ts">
+defineProps<{
+  perspective?: number
+  transform?: string
+}>()
+</script>
+
+<template>
+  <div
+    class="volumed"
+    :style="{
+      perspective: `${perspective}px`,
+      transform,
+    }"
+  >
+    <slot />
+  </div>
+</template>
+
+<style scoped>
+.volumed {
+  transform-style: preserve-3d;
+  width: fit-content;
+  height: fit-content;
+}
+</style>
diff --git a/packages/stage-ui/src/components/Graphics/index.ts b/packages/stage-ui/src/components/Graphics/index.ts
new file mode 100644
index 000000000..dc1ee3503
--- /dev/null
+++ b/packages/stage-ui/src/components/Graphics/index.ts
@@ -0,0 +1 @@
+export { default as Volumed } from './Volumed.vue'
diff --git a/packages/stage-ui/src/components/Physics/CursorMomentum.story.vue b/packages/stage-ui/src/components/Physics/CursorMomentum.story.vue
new file mode 100644
index 000000000..a4d37d827
--- /dev/null
+++ b/packages/stage-ui/src/components/Physics/CursorMomentum.story.vue
@@ -0,0 +1,133 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+
+import CursorMomentum from './CursorMomentum.vue'
+
+// Example components that use momentum
+const rotatingBox = ref(null)
+const floatingBall = ref(null)
+const pulsingCircle = ref(null)
+</script>
+
+<template>
+  <Story
+    title="Cursor Momentum"
+    group="physics"
+    :layout="{ type: 'grid', width: 600 }"
+  >
+    <template #controls>
+      <ThemeColorsHueControl />
+    </template>
+
+    <Variant
+      id="rotating-box"
+      title="Rotating Box"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <CursorMomentum
+          v-slot="{ currentValue }"
+          :base-speed="0.1"
+          :friction="0.95"
+          :momentum-factor="0.005"
+        >
+          <div
+            ref="rotatingBox"
+            class="bg-primary-500/20 h-20 w-20"
+            :style="{
+              transform: `rotate(${currentValue}deg)`,
+            }"
+          />
+        </CursorMomentum>
+      </div>
+    </Variant>
+
+    <Variant
+      id="floating-ball"
+      title="Floating Ball"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <CursorMomentum
+          v-slot="{ momentum }"
+          :base-speed="0.5"
+          :friction="0.98"
+          :momentum-factor="0.01"
+        >
+          <div
+            ref="floatingBall"
+            class="bg-primary-500/20 h-10 w-10 rounded-full"
+            :style="{
+              transform: `translateY(${Math.sin(momentum * 0.1) * 20}px)`,
+            }"
+          />
+        </CursorMomentum>
+      </div>
+    </Variant>
+
+    <Variant
+      id="pulsing-circle"
+      title="Pulsing Circle"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <CursorMomentum
+          v-slot="{ momentum }"
+          :base-speed="1"
+          :friction="0.9"
+          :momentum-factor="0.008"
+        >
+          <div
+            ref="pulsingCircle"
+            class="bg-primary-500/20 h-16 w-16 rounded-full"
+            :style="{
+              transform: `scale(${0.8 + (momentum * 0.2)})`,
+            }"
+          />
+        </CursorMomentum>
+      </div>
+    </Variant>
+
+    <Variant
+      id="test-dummy"
+      title="Test Dummy Marker"
+    >
+      <div class="h-40 flex items-center justify-center">
+        <CursorMomentum
+          v-slot="{ currentValue }"
+          :base-speed="0.1"
+          :friction="0.95"
+          :momentum-factor="0.005"
+        >
+          <div
+            class="crash-test-dummy"
+            :style="{
+              width: '40px',
+              height: '40px',
+              transform: `rotateX(45deg) rotate(${currentValue}deg)`,
+            }"
+          >
+            <div class="marker" />
+          </div>
+        </CursorMomentum>
+      </div>
+    </Variant>
+  </Story>
+</template>
+
+<style scoped>
+.crash-test-dummy {
+  display: inline-block;
+  position: relative;
+  transform-style: preserve-3d;
+}
+
+.crash-test-dummy .marker {
+  position: absolute;
+  inset: 0;
+  background: conic-gradient(#ffeb3b 0deg 90deg, #000 90deg 180deg, #ffeb3b 180deg 270deg, #000 270deg 360deg);
+  border-radius: 50%;
+  box-shadow: 0 4px 12px rgba(185, 185, 185, 0.2);
+}
+
+.dark .crash-test-dummy .marker {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+}
+</style>
diff --git a/packages/stage-ui/src/components/Physics/CursorMomentum.vue b/packages/stage-ui/src/components/Physics/CursorMomentum.vue
new file mode 100644
index 000000000..06a4b5686
--- /dev/null
+++ b/packages/stage-ui/src/components/Physics/CursorMomentum.vue
@@ -0,0 +1,70 @@
+<script setup lang="ts">
+import { onMounted, onUnmounted, ref, toRef } from 'vue'
+
+const props = withDefaults(defineProps<{
+  baseSpeed?: number
+  friction?: number
+  momentumFactor?: number
+}>(), {
+  baseSpeed: 0.1,
+  friction: 0.95,
+  momentumFactor: 0.005,
+})
+
+const momentum = ref(1) // Base momentum
+const currentValue = ref(0)
+let lastTimestamp = 0
+
+// Physics parameters with defaults
+const FRICTION = toRef(() => props.friction)
+const BASE_SPEED = toRef(() => props.baseSpeed)
+const MOMENTUM_FACTOR = toRef(() => props.momentumFactor)
+
+function updateMomentum(timestamp: number) {
+  if (!lastTimestamp)
+    lastTimestamp = timestamp
+  const deltaTime = timestamp - lastTimestamp
+  lastTimestamp = timestamp
+
+  // Apply friction to gradually return to base speed
+  momentum.value = BASE_SPEED.value + (momentum.value - BASE_SPEED.value) * FRICTION.value
+
+  // Update value based on current momentum
+  currentValue.value += momentum.value * deltaTime
+
+  requestAnimationFrame(updateMomentum)
+}
+
+function handleMouseMove(event: MouseEvent) {
+  // Calculate movement speed
+  const speed = Math.sqrt(
+    event.movementX ** 2
+    + event.movementY ** 2,
+  )
+
+  // Add to current momentum
+  momentum.value += speed * MOMENTUM_FACTOR.value
+}
+
+onMounted(() => {
+  window.addEventListener('mousemove', handleMouseMove)
+  requestAnimationFrame(updateMomentum)
+})
+
+onUnmounted(() => {
+  window.removeEventListener('mousemove', handleMouseMove)
+})
+
+// Expose values and momentum to parent
+defineExpose({
+  momentum,
+  currentValue,
+})
+</script>
+
+<template>
+  <slot
+    :momentum="momentum"
+    :current-value="currentValue"
+  />
+</template>
diff --git a/packages/stage-ui/src/components/Physics/index.ts b/packages/stage-ui/src/components/Physics/index.ts
new file mode 100644
index 000000000..68db51ad0
--- /dev/null
+++ b/packages/stage-ui/src/components/Physics/index.ts
@@ -0,0 +1 @@
+export { default as CursorMomentum } from './CursorMomentum.vue'
diff --git a/packages/stage-ui/src/components/index.ts b/packages/stage-ui/src/components/index.ts
index f053fbf95..eea69ef77 100644
--- a/packages/stage-ui/src/components/index.ts
+++ b/packages/stage-ui/src/components/index.ts
@@ -1,9 +1,12 @@
 export { default as BasicTextarea } from './BasicTextarea.vue'
 export { default as Collapsable } from './Collapsable.vue'
 export * from './Form'
+export * from './Gadgets'
+export * from './Graphics'
 export { default as Live2DCanvas } from './Live2D/Canvas.vue'
 export { default as Live2DModel } from './Live2D/Model.vue'
 export * from './Menu'
+export * from './Physics'
 export * from './Providers'
 export { default as SceneLive2D } from './Scenes/Live2D.vue'
 export { default as SceneVRM } from './Scenes/VRM.vue'