diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 4ae1579..4ad6239 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -31,7 +31,7 @@
         "react-helmet-async": "^2.0.5",
         "react-markdown": "^10.1.0",
         "react-markdown-editor-lite": "^1.3.4",
-        "react-router-dom": "^6.30.0",
+        "react-router-dom": "^6.30.1",
         "react-youtube": "^10.1.0",
         "remark-gfm": "^4.0.1",
         "tailwind-merge": "^3.3.0",
@@ -6030,9 +6030,9 @@
       }
     },
     "node_modules/react-router": {
-      "version": "6.30.0",
-      "resolved": "https://registry.npmjs.org/react-router/-/react-router-6.30.0.tgz",
-      "integrity": "sha512-D3X8FyH9nBcTSHGdEKurK7r8OYE1kKFn3d/CF+CoxbSHkxU7o37+Uh7eAHRXr6k2tSExXYO++07PeXJtA/dEhQ==",
+      "version": "6.30.1",
+      "resolved": "https://registry.npmjs.org/react-router/-/react-router-6.30.1.tgz",
+      "integrity": "sha512-X1m21aEmxGXqENEPG3T6u0Th7g0aS4ZmoNynhbs+Cn+q+QGTLt+d5IQ2bHAXKzKcxGJjxACpVbnYQSCRcfxHlQ==",
       "license": "MIT",
       "dependencies": {
         "@remix-run/router": "1.23.0"
@@ -6045,13 +6045,13 @@
       }
     },
     "node_modules/react-router-dom": {
-      "version": "6.30.0",
-      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-6.30.0.tgz",
-      "integrity": "sha512-x30B78HV5tFk8ex0ITwzC9TTZMua4jGyA9IUlH1JLQYQTFyxr/ZxwOJq7evg1JX1qGVUcvhsmQSKdPncQrjTgA==",
+      "version": "6.30.1",
+      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-6.30.1.tgz",
+      "integrity": "sha512-llKsgOkZdbPU1Eg3zK8lCn+sjD9wMRZZPuzmdWWX5SUs8OFkN5HnFVC0u5KMeMaC9aoancFI/KoLuKPqN+hxHw==",
       "license": "MIT",
       "dependencies": {
         "@remix-run/router": "1.23.0",
-        "react-router": "6.30.0"
+        "react-router": "6.30.1"
       },
       "engines": {
         "node": ">=14.0.0"
diff --git a/frontend/package.json b/frontend/package.json
index e112578..df73a58 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -33,7 +33,7 @@
     "react-helmet-async": "^2.0.5",
     "react-markdown": "^10.1.0",
     "react-markdown-editor-lite": "^1.3.4",
-    "react-router-dom": "^6.30.0",
+    "react-router-dom": "^6.30.1",
     "react-youtube": "^10.1.0",
     "remark-gfm": "^4.0.1",
     "tailwind-merge": "^3.3.0",
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index d844463..98fa8ce 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,5 +1,10 @@
+import { AnimatePresence, LayoutGroup } from 'framer-motion'
 import { useEffect, useState } from 'react'
-import { BrowserRouter, Navigate, Route, Routes, useLocation } from 'react-router-dom'
+import { BrowserRouter,
+	 Navigate,
+	 Route,
+	 Routes,
+	 useLocation } from 'react-router-dom'
 
 import RouteBlockerOverlay from '@/components/RouteBlockerOverlay'
 import TopNav from '@/components/TopNav'
@@ -20,11 +25,41 @@ import WikiHistoryPage from '@/pages/wiki/WikiHistoryPage'
 import WikiNewPage from '@/pages/wiki/WikiNewPage'
 import WikiSearchPage from '@/pages/wiki/WikiSearchPage'
 
-import type { FC } from 'react'
+import type { Dispatch, FC, SetStateAction } from 'react'
 
 import type { User } from '@/types'
 
 
+const RouteTransitionWrapper = ({ user, setUser }: {
+    user:     User | null
+    setUser:  Dispatch<SetStateAction<User | null>> }) => {
+  const location = useLocation ()
+
+  return (
+      <LayoutGroup id="gallery-shared">
+	<AnimatePresence mode="wait">
+	  <Routes location={location} key={location.pathname}>
+	    <Route path="/" element={<Navigate to="/posts" replace/>}/>
+	    <Route path="/posts" element={<PostListPage/>}/>
+	    <Route path="/posts/new" element={<PostNewPage user={user}/>}/>
+	    <Route path="/posts/:id" element={<PostDetailRoute user={user}/>}/>
+	    <Route path="/posts/changes" element={<PostHistoryPage/>}/>
+	    <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>
+	    <Route path="/wiki" element={<WikiSearchPage/>}/>
+	    <Route path="/wiki/:title" element={<WikiDetailPage/>}/>
+	    <Route path="/wiki/new" element={<WikiNewPage user={user}/>}/>
+	    <Route path="/wiki/:id/edit" element={<WikiEditPage user={user}/>}/>
+	    <Route path="/wiki/:id/diff" element={<WikiDiffPage/>}/>
+	    <Route path="/wiki/changes" element={<WikiHistoryPage/>}/>
+	    <Route path="/users/settings" element={<SettingPage user={user} setUser={setUser}/>}/>
+	    <Route path="/settings" element={<Navigate to="/users/settings" replace/>}/>
+	    <Route path="*" element={<NotFound/>}/>
+	  </Routes>
+	</AnimatePresence>
+      </LayoutGroup>)
+}
+
+
 const PostDetailRoute = ({ user }: { user: User | null }) => {
   const location = useLocation ()
   const key = location.pathname
@@ -81,23 +116,7 @@ export default (() => {
 	<BrowserRouter>
 	  <div className="flex flex-col h-screen w-screen">
 	    <TopNav user={user}/>
-	    <Routes>
-	      <Route path="/" element={<Navigate to="/posts" replace/>}/>
-	      <Route path="/posts" element={<PostListPage/>}/>
-	      <Route path="/posts/new" element={<PostNewPage user={user}/>}/>
-	      <Route path="/posts/:id" element={<PostDetailRoute user={user}/>}/>
-	      <Route path="/posts/changes" element={<PostHistoryPage/>}/>
-	      <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>
-	      <Route path="/wiki" element={<WikiSearchPage/>}/>
-	      <Route path="/wiki/:title" element={<WikiDetailPage/>}/>
-	      <Route path="/wiki/new" element={<WikiNewPage user={user}/>}/>
-	      <Route path="/wiki/:id/edit" element={<WikiEditPage user={user}/>}/>
-	      <Route path="/wiki/:id/diff" element={<WikiDiffPage/>}/>
-	      <Route path="/wiki/changes" element={<WikiHistoryPage/>}/>
-	      <Route path="/users/settings" element={<SettingPage user={user} setUser={setUser}/>}/>
-	      <Route path="/settings" element={<Navigate to="/users/settings" replace/>}/>
-	      <Route path="*" element={<NotFound/>}/>
-	    </Routes>
+	    <RouteTransitionWrapper user={user} setUser={setUser}/>
 	  </div>
 	  <Toaster/>
 	</BrowserRouter>
diff --git a/frontend/src/components/PostList.tsx b/frontend/src/components/PostList.tsx
index 1856bc3..39adbb3 100644
--- a/frontend/src/components/PostList.tsx
+++ b/frontend/src/components/PostList.tsx
@@ -1,4 +1,9 @@
+import { motion } from 'framer-motion'
+import { useRef } from 'react'
+import { useLocation } from 'react-router-dom'
+
 import PrefetchLink from '@/components/PrefetchLink'
+import { useSharedTransitionStore } from '@/stores/sharedTransitionStore'
 
 import type { FC, MouseEvent } from 'react'
 
@@ -8,19 +13,58 @@ type Props = { posts:     Post[]
 	       onClick?:  (event: MouseEvent<HTMLElement>) => void }
 
 
-export default (({ posts, onClick }: Props) => (
-    <div className="flex flex-wrap gap-6 p-4">
-      {posts.map ((post, i) => (
-	  <PrefetchLink
-	      to={`/posts/${ post.id }`}
-	      key={post.id}
-	      className="w-40 h-40 overflow-hidden rounded-lg shadow-md hover:shadow-lg"
-	      onClick={onClick}>
-	    <img src={post.thumbnail || post.thumbnailBase || undefined}
-		 alt={post.title || post.url}
-		 title={post.title || post.url || undefined}
-		 loading={i < 12 ? 'eager' : 'lazy'}
-		 decoding="async"
-		 className="object-cover w-full h-full"/>
-	  </PrefetchLink>))}
-    </div>)) satisfies FC<Props>
+export default (({ posts, onClick }: Props) => {
+  const location = useLocation ()
+
+  const setForLocationKey = useSharedTransitionStore (s => s.setForLocationKey)
+
+  const cardRef = useRef<HTMLDivElement> (null)
+
+  return (
+      <div className="flex flex-wrap gap-6 p-4">
+	{posts.map ((post, i) => {
+	  const sharedId = `page-${ post.id }`
+	  const layoutId = sharedId
+
+	  return (
+	      <PrefetchLink
+		  to={`/posts/${ post.id }`}
+		  key={post.id}
+		  className="w-40 h-40"
+		  state={{ sharedId }}
+		  onClick={e => {
+		    setForLocationKey (location.key, sharedId)
+		    onClick?.(e)
+		  }}>
+		<motion.div
+		    ref={cardRef}
+		    layoutId={layoutId}
+		    className="w-full h-full overflow-hidden rounded-xl shadow
+			       transform-gpu will-change-transform"
+		    whileHover={{ scale: 1.02 }}
+		    onLayoutAnimationStart={() => {
+		      if (!(cardRef.current))
+			return
+
+		      cardRef.current.style.position = 'relative'
+		      cardRef.current.style.zIndex = '9999'
+		    }}
+		    onLayoutAnimationComplete={() => {
+		      if (!(cardRef.current))
+			return 
+
+		      cardRef.current.style.zIndex = ''
+		      cardRef.current.style.position = ''
+		    }}
+		    transition={{ type: 'spring', stiffness: 500, damping: 40, mass: .5 }}>
+		  <img src={post.thumbnail || post.thumbnailBase || undefined}
+		       alt={post.title || post.url}
+		       title={post.title || post.url || undefined}
+		       loading={i < 12 ? 'eager' : 'lazy'}
+		       decoding="async"
+		       className="object-cover w-full h-full"/>
+		</motion.div>
+	      </PrefetchLink>)
+	})}
+      </div>)
+}) satisfies FC<Props>
diff --git a/frontend/src/components/PrefetchLink.tsx b/frontend/src/components/PrefetchLink.tsx
index f983b0d..0aebe18 100644
--- a/frontend/src/components/PrefetchLink.tsx
+++ b/frontend/src/components/PrefetchLink.tsx
@@ -1,5 +1,6 @@
 import { useQueryClient } from '@tanstack/react-query'
 import { forwardRef, useMemo } from 'react'
+import { flushSync } from 'react-dom'
 import { createPath, useNavigate } from 'react-router-dom'
 
 import { useOverlayStore } from '@/components/RouteBlockerOverlay'
@@ -11,6 +12,7 @@ import type { To } from 'react-router-dom'
 
 type Props = AnchorHTMLAttributes<HTMLAnchorElement> & {
     to:             To
+    state?:         Record<string, string>
     replace?:       boolean
     className?:     string
     cancelOnError?: boolean }
@@ -20,11 +22,15 @@ export default forwardRef<HTMLAnchorElement, Props> (({
     to,
     replace,
     className,
+    state,
     onMouseEnter,
     onTouchStart,
     onClick,
     cancelOnError = false,
     ...rest }, ref) => {
+  if ('onClick' in rest)
+    delete rest['onClick']
+
   const navigate = useNavigate ()
   const qc = useQueryClient ()
   const url = useMemo (() => {
@@ -57,25 +63,37 @@ export default forwardRef<HTMLAnchorElement, Props> (({
   }
 
   const handleClick = async (ev: MouseEvent<HTMLAnchorElement>) => {
-    onClick?.(ev)
+    try
+    {
+      onClick?.(ev)
 
-    if (ev.defaultPrevented
-	|| ev.metaKey
-	|| ev.ctrlKey
-	|| ev.shiftKey
-	|| ev.altKey)
-      return
+      if (ev.defaultPrevented
+	  || ev.metaKey
+	  || ev.ctrlKey
+	  || ev.shiftKey
+	  || ev.altKey)
+	return
 
-    ev.preventDefault ()
+      ev.preventDefault ()
 
-    setOverlay (true)
-    const ok = await doPrefetch ()
-    setOverlay (false)
+      flushSync (() => {
+	setOverlay (true)
+      })
+      const ok = await doPrefetch ()
+      flushSync (() => {
+	setOverlay (false)
+      })
 
-    if (!(ok) && cancelOnError)
-      return
+      if (!(ok) && cancelOnError)
+	return
 
-    navigate (to, { replace })
+      navigate (to, { replace, ...(state && { state }) })
+    }
+    catch (ex)
+    {
+      console.log (ex)
+      ev.preventDefault ()
+    }
   }
 
   return (
diff --git a/frontend/src/components/TopNav.tsx b/frontend/src/components/TopNav.tsx
index 2133395..6d77c95 100644
--- a/frontend/src/components/TopNav.tsx
+++ b/frontend/src/components/TopNav.tsx
@@ -138,9 +138,13 @@ export default (({ user }: Props) => {
 	<nav className="px-3 flex justify-between items-center w-full min-h-[48px]
 			bg-yellow-200 dark:bg-red-975 md:bg-yellow-50">
 	  <div className="flex items-center gap-2 h-full">
-	    <PrefetchLink to="/"
-		  className="mx-4 text-xl font-bold text-pink-600 hover:text-pink-400
-			     dark:text-pink-300 dark:hover:text-pink-100">
+	    <PrefetchLink
+		to="/posts"
+		className="mx-4 text-xl font-bold text-pink-600 hover:text-pink-400
+			   dark:text-pink-300 dark:hover:text-pink-100"
+		onClick={() => {
+		  scroll (0, 0)
+		}}>
 	      ぼざクリ タグ広場
 	    </PrefetchLink>
 
diff --git a/frontend/src/components/layout/MainArea.tsx b/frontend/src/components/layout/MainArea.tsx
index c2117a3..1067101 100644
--- a/frontend/src/components/layout/MainArea.tsx
+++ b/frontend/src/components/layout/MainArea.tsx
@@ -1,9 +1,13 @@
-import React from 'react'
+import { cn } from '@/lib/utils'
 
-type Props = { children: React.ReactNode }
+import type { FC, ReactNode } from 'react'
 
+type Props = {
+    children:   ReactNode
+    className?: string }
 
-export default ({ children }: Props) => (
-    <main className="flex-1 overflow-y-auto p-4">
+
+export default (({ children, className }: Props) => (
+    <main className={cn ('flex-1 overflow-y-auto p-4', className)}>
       {children}
-    </main>)
+    </main>)) satisfies FC<Props>
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index 8227c51..5007a88 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -72,5 +72,4 @@ export const apiDelete = async (
 }
 
 
-export const isApiError = (err: unknown): err is AxiosError =>
-    axios.isAxiosError (err)
+export const isApiError = (err: unknown): err is AxiosError => axios.isAxiosError (err)
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
index c7fbdb2..64630d2 100644
--- a/frontend/src/main.tsx
+++ b/frontend/src/main.tsx
@@ -11,7 +11,7 @@ const client = new QueryClient ({
     defaultOptions: {
 	queries: { staleTime: 5 * 60 * 1000,
 		   gcTime:    30 * 60 * 1000,
-		   retry:     1 }}})
+		   retry:     1 } } })
 
 createRoot (document.getElementById ('root')!).render (
     <HelmetProvider context={helmetContext}>
diff --git a/frontend/src/pages/posts/PostDetailPage.tsx b/frontend/src/pages/posts/PostDetailPage.tsx
index 3b1e9e2..828e09e 100644
--- a/frontend/src/pages/posts/PostDetailPage.tsx
+++ b/frontend/src/pages/posts/PostDetailPage.tsx
@@ -1,12 +1,13 @@
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
+import { motion } from 'framer-motion'
 import { useEffect, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useParams } from 'react-router-dom'
 
-import PostList from '@/components/PostList'
-import TagDetailSidebar from '@/components/TagDetailSidebar'
 import PostEditForm from '@/components/PostEditForm'
 import PostEmbed from '@/components/PostEmbed'
+import PostList from '@/components/PostList'
+import TagDetailSidebar from '@/components/TagDetailSidebar'
 import TabGroup, { Tab } from '@/components/common/TabGroup'
 import MainArea from '@/components/layout/MainArea'
 import { Button } from '@/components/ui/button'
@@ -72,6 +73,8 @@ export default (({ user }: Props) => {
   }, [errorFlg, error])
 
   useEffect (() => {
+    scroll (0, 0)
+
     setStatus (200)
   }, [id])
 
@@ -99,10 +102,24 @@ export default (({ user }: Props) => {
 	  <TagDetailSidebar post={post ?? null}/>
 	</div>
 
-	<MainArea>
+	<MainArea className="relative">
 	  {post
 	   ? (
 	      <>
+		{(post.thumbnail || post.thumbnailBase) && (
+		    <motion.div
+			layoutId={`page-${ id }`}
+			className="absolute top-4 left-4 w-[min(640px,calc(100vw-2rem))] h-[360px]
+				   overflow-hidden rounded-xl pointer-events-none z-50"
+			initial={{ opacity: 1 }}
+			animate={{ opacity: 0 }}
+			transition={{ duration: .2, ease: 'easeOut' }}>
+		      <img src={post.thumbnail || post.thumbnailBase}
+			   alt={post.title || post.url}
+			   title={post.title || post.url || undefined}
+			   className="object-cover w-full h-full"/>
+		    </motion.div>)}
+
 		<PostEmbed post={post}/>
 		<Button onClick={() => changeViewedFlg.mutate ()}
 			disabled={changeViewedFlg.isPending}
diff --git a/frontend/src/pages/posts/PostListPage.tsx b/frontend/src/pages/posts/PostListPage.tsx
index 1440985..8dc20d6 100644
--- a/frontend/src/pages/posts/PostListPage.tsx
+++ b/frontend/src/pages/posts/PostListPage.tsx
@@ -15,10 +15,12 @@ import { fetchPosts } from '@/lib/posts'
 import { postsKeys } from '@/lib/queryKeys'
 import { fetchWikiPageByTitle } from '@/lib/wiki'
 
+import type { FC } from 'react'
+
 import type { WikiPage } from '@/types'
 
 
-export default () => {
+export default (() => {
   const containerRef = useRef<HTMLDivElement | null> (null)
 
   const [wikiPage, setWikiPage] = useState<WikiPage | null> (null)
@@ -41,21 +43,24 @@ export default () => {
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
   useLayoutEffect (() => {
+    scroll (0, 0)
+
     setWikiPage (null)
-    if (tags.length === 1)
+
+    if (tags.length !== 1)
+      return
+
+    void (async () => {
+      try
+      {
+	const tagName = tags[0]
+	setWikiPage (await fetchWikiPageByTitle (tagName, { }))
+      }
+      catch
       {
-	void (async () => {
-	  try
-	  {
-	    const tagName = tags[0]
-	    setWikiPage (await fetchWikiPageByTitle (tagName, { }))
-	  }
-	  catch
-	  {
-	    ;
-	  }
-	}) ()
+	;
       }
+    }) ()
   }, [location.search])
 
   return (
@@ -100,4 +105,4 @@ export default () => {
 	  </TabGroup>
 	</MainArea>
       </div>)
-}
+}) satisfies FC
diff --git a/frontend/src/stores/sharedTransitionStore.ts b/frontend/src/stores/sharedTransitionStore.ts
new file mode 100644
index 0000000..c0a7e98
--- /dev/null
+++ b/frontend/src/stores/sharedTransitionStore.ts
@@ -0,0 +1,19 @@
+import { create } from 'zustand'
+
+type SharedTransitionState = {
+    byLocationKey:        Record<string, string>
+    setForLocationKey:    (locationKey: string, sharedId: string) => void
+    clearForLocationKey:  (locationKey: string) => void }
+
+
+export const useSharedTransitionStore = create<SharedTransitionState> (set => ({
+    byLocationKey:      { },
+    setForLocationKey:  (locationKey, sharedId) =>
+	set (state => ({ byLocationKey: { ...state.byLocationKey,
+					  [locationKey]: sharedId } })),
+    clearForLocationKey: (locationKey) =>
+	set (state => {
+	  const next = { ...state.byLocationKey }
+	  delete next[locationKey]
+	  return { byLocationKey: next }
+	}) }))