diff --git a/package.json b/package.json
index 0ef90a226..c39294c97 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "12.116.0-simkey-v2",
+	"version": "12.116.0-simkey-v3",
 	"codename": "indigo",
 	"repository": {
 		"type": "git",
diff --git a/packages/client/src/ui/_common_old/sidebar-for-mobile.vue b/packages/client/src/ui/_common_old/sidebar-for-mobile.vue
index d75a8f456..9da8b7cfc 100644
--- a/packages/client/src/ui/_common_old/sidebar-for-mobile.vue
+++ b/packages/client/src/ui/_common_old/sidebar-for-mobile.vue
@@ -1,33 +1,43 @@
 <template>
 <div class="kmwsukvl">
-	<div>
-		<button v-click-anime class="item _button account" @click="openAccountMenu">
-			<MkAvatar :user="$i" class="avatar"/><MkAcct class="text" :user="$i"/>
-		</button>
-		<MkA v-click-anime class="item index" active-class="active" to="/" exact>
-			<i class="fas fa-home fa-fw"></i><span class="text">{{ $ts.timeline }}</span>
-		</MkA>
-		<template v-for="item in menu">
-			<div v-if="item === '-'" class="divider"></div>
-			<component :is="menuDef[item].to ? 'MkA' : 'button'" v-else-if="menuDef[item] && (menuDef[item].show !== false)" v-click-anime class="item _button" :class="[item, { active: menuDef[item].active }]" active-class="active" :to="menuDef[item].to" v-on="menuDef[item].action ? { click: menuDef[item].action } : {}">
-				<i class="fa-fw" :class="menuDef[item].icon"></i><span class="text">{{ $ts[menuDef[item].title] }}</span>
-				<span v-if="menuDef[item].indicated" class="indicator"><i class="fas fa-circle"></i></span>
-			</component>
-		</template>
-		<div class="divider"></div>
-		<MkA v-if="$i.isAdmin || $i.isModerator" v-click-anime class="item" active-class="active" to="/admin">
-			<i class="fas fa-door-open fa-fw"></i><span class="text">{{ $ts.controlPanel }}</span>
-		</MkA>
-		<button v-click-anime class="item _button" @click="more">
-			<i class="fa fa-ellipsis-h fa-fw"></i><span class="text">{{ $ts.more }}</span>
-			<span v-if="otherMenuItemIndicated" class="indicator"><i class="fas fa-circle"></i></span>
-		</button>
-		<MkA v-click-anime class="item" active-class="active" to="/settings">
-			<i class="fas fa-cog fa-fw"></i><span class="text">{{ $ts.settings }}</span>
-		</MkA>
-		<button class="item _button post" data-cy-open-post-form @click="post">
-			<i class="fas fa-pencil-alt fa-fw"></i><span class="text">{{ $ts.note }}</span>
-		</button>
+	<div class="body">
+		<div class="top">
+			<div class="banner" :style="{ backgroundImage: `url(${ $instance.bannerUrl })` }"></div>
+			<button v-click-anime class="item _button instance" @click="openInstanceMenu">
+				<img :src="$instance.iconUrl || $instance.faviconUrl || '/favicon.ico'" alt="" class="icon"/>
+			</button>
+		</div>
+		<div class="middle">
+			<MkA v-click-anime class="item index" active-class="active" to="/" exact>
+				<i class="icon fas fa-home fa-fw"></i><span class="text">{{ $ts.timeline }}</span>
+			</MkA>
+			<template v-for="item in menu">
+				<div v-if="item === '-'" class="divider"></div>
+				<component :is="navbarItemDef[item].to ? 'MkA' : 'button'" v-else-if="navbarItemDef[item] && (navbarItemDef[item].show !== false)" v-click-anime class="item _button" :class="[item, { active: navbarItemDef[item].active }]" active-class="active" :to="navbarItemDef[item].to" v-on="navbarItemDef[item].action ? { click: navbarItemDef[item].action } : {}">
+					<i class="icon fa-fw" :class="navbarItemDef[item].icon"></i><span class="text">{{ $ts[navbarItemDef[item].title] }}</span>
+					<span v-if="navbarItemDef[item].indicated" class="indicator"><i class="icon fas fa-circle"></i></span>
+				</component>
+			</template>
+			<div class="divider"></div>
+			<MkA v-if="$i.isAdmin || $i.isModerator" v-click-anime class="item" active-class="active" to="/admin">
+				<i class="icon fas fa-door-open fa-fw"></i><span class="text">{{ $ts.controlPanel }}</span>
+			</MkA>
+			<button v-click-anime class="item _button" @click="more">
+				<i class="icon fa fa-ellipsis-h fa-fw"></i><span class="text">{{ $ts.more }}</span>
+				<span v-if="otherMenuItemIndicated" class="indicator"><i class="icon fas fa-circle"></i></span>
+			</button>
+			<MkA v-click-anime class="item" active-class="active" to="/settings">
+				<i class="icon fas fa-cog fa-fw"></i><span class="text">{{ $ts.settings }}</span>
+			</MkA>
+		</div>
+		<div class="bottom">
+			<button class="item _button post" data-cy-open-post-form @click="os.post">
+				<i class="icon fas fa-pencil-alt fa-fw"></i><span class="text">{{ $ts.note }}</span>
+			</button>
+			<button v-click-anime class="item _button account" @click="openAccountMenu">
+				<MkAvatar :user="$i" class="avatar"/><MkAcct class="text" :user="$i"/>
+			</button>
+		</div>
 	</div>
 </div>
 </template>
@@ -90,119 +100,69 @@ function more() {
 
 <style lang="scss" scoped>
 .kmwsukvl {
-	$ui-font-size: 1em; // TODO: どこかに集約したい
-	$avatar-size: 32px;
-	$avatar-margin: 8px;
-
 	backdrop-filter: var(--blur, blur(8px));
 	-webkit-backdrop-filter: var(--blur, blur(8px));
+	> .body {
+		display: flex;
+		flex-direction: column;
 
-	> div {
+		> .top {
+			position: sticky;
+			top: 0;
+			z-index: 1;
+			padding: 20px 0;
+			background: var(--X14);
+			-webkit-backdrop-filter: var(--blur, blur(8px));
+			backdrop-filter: var(--blur, blur(8px));
 
-		> .divider {
-			margin: 16px 16px;
-			border-top: solid 0.5px var(--divider);
-		}
-
-		> .item {
-			position: relative;
-			display: block;
-			padding-left: 24px;
-			font-size: $ui-font-size;
-			line-height: 2.85rem;
-			text-overflow: ellipsis;
-			overflow: hidden;
-			white-space: nowrap;
-			width: 100%;
-			text-align: left;
-			box-sizing: border-box;
-			color: var(--navFg);
-
-			> i {
-				position: relative;
-				width: 32px;
-			}
-
-			> i,
-			> .avatar {
-				margin-right: $avatar-margin;
-			}
-
-			> .avatar {
-				width: $avatar-size;
-				height: $avatar-size;
-				vertical-align: middle;
-			}
-
-			> .indicator {
+			> .banner {
 				position: absolute;
 				top: 0;
-				left: 20px;
-				color: var(--navIndicator);
-				font-size: 8px;
-				animation: blink 1s infinite;
+				left: 0;
+				width: 100%;
+				height: 100%;
+				background-size: cover;
+				background-position: center center;
+				-webkit-mask-image: linear-gradient(0deg, rgba(0,0,0,0) 15%, rgba(0,0,0,0.75) 100%);
+				mask-image: linear-gradient(0deg, rgba(0,0,0,0) 15%, rgba(0,0,0,0.75) 100%);
 			}
 
-			> .text {
+			> .instance {
 				position: relative;
-				font-size: 0.9em;
-			}
+				display: block;
+				text-align: center;
+				width: 100%;
 
-			&:hover {
-				text-decoration: none;
-				color: var(--navHoverFg);
-			}
-
-			&.active {
-				color: var(--navActive);
-			}
-
-			&:hover, &.active {
-				&:before {
-					content: "";
-					display: block;
-					width: calc(100% - 24px);
-					height: 100%;
-					margin: auto;
-					position: absolute;
-					top: 0;
-					left: 0;
-					right: 0;
-					bottom: 0;
-					border-radius: 999px;
-					background: var(--accentedBg);
+				> .icon {
+					display: inline-block;
+					width: 38px;
+					aspect-ratio: 1;
 				}
 			}
+		}
 
-			&:first-child, &:last-child {
-				position: sticky;
-				z-index: 1;
-				padding-top: 8px;
-				padding-bottom: 8px;
-				background: var(--X14);
-				-webkit-backdrop-filter: var(--blur, blur(8px));
-				backdrop-filter: var(--blur, blur(8px));
-			}
+		> .bottom {
+			position: sticky;
+			bottom: 0;
+			padding: 20px 0;
+			background: var(--X14);
+			-webkit-backdrop-filter: var(--blur, blur(8px));
+			backdrop-filter: var(--blur, blur(8px));
 
-			&:first-child {
-				top: 0;
-
-				&:hover, &.active {
-					&:before {
-						content: none;
-					}
-				}
-			}
-
-			&:last-child {
-				bottom: 0;
+			> .post {
+				position: relative;
+				display: block;
+				width: 100%;
+				height: 40px;
 				color: var(--fgOnAccent);
+				font-weight: bold;
+				text-align: left;
 
 				&:before {
 					content: "";
 					display: block;
-					width: calc(100% - 20px);
-					height: calc(100% - 20px);
+					width: calc(100% - 38px);
+					height: 100%;
 					margin: auto;
 					position: absolute;
 					top: 0;
@@ -212,12 +172,113 @@ function more() {
 					border-radius: 999px;
 					background: linear-gradient(90deg, var(--buttonGradateA), var(--buttonGradateB));
 				}
-				
+
 				&:hover, &.active {
 					&:before {
 						background: var(--accentLighten);
 					}
 				}
+
+				> .icon {
+					position: relative;
+					margin-left: 30px;
+					margin-right: 8px;
+					width: 32px;
+				}
+
+				> .text {
+					position: relative;
+				}
+			}
+
+			> .account {
+				position: relative;
+				display: flex;
+				align-items: center;
+				padding-left: 30px;
+				text-overflow: ellipsis;
+				overflow: hidden;
+				white-space: nowrap;
+				width: 100%;
+				text-align: left;
+				box-sizing: border-box;
+				margin-top: 16px;
+
+				> .avatar {
+					position: relative;
+					width: 32px;
+					aspect-ratio: 1;
+					margin-right: 8px;
+				}
+			}
+		}
+
+		> .middle {
+			flex: 1;
+
+			> .divider {
+				margin: 16px 16px;
+				border-top: solid 0.5px var(--divider);
+			}
+
+			> .item {
+				position: relative;
+				display: block;
+				padding-left: 24px;
+				line-height: 2.85rem;
+				text-overflow: ellipsis;
+				overflow: hidden;
+				white-space: nowrap;
+				width: 100%;
+				text-align: left;
+				box-sizing: border-box;
+				color: var(--navFg);
+
+				> .icon {
+					position: relative;
+					width: 32px;
+					margin-right: 8px;
+				}
+
+				> .indicator {
+					position: absolute;
+					top: 0;
+					left: 20px;
+					color: var(--navIndicator);
+					font-size: 8px;
+					animation: blink 1s infinite;
+				}
+
+				> .text {
+					position: relative;
+					font-size: 0.9em;
+				}
+
+				&:hover {
+					text-decoration: none;
+					color: var(--navHoverFg);
+				}
+
+				&.active {
+					color: var(--navActive);
+				}
+
+				&:hover, &.active {
+					&:before {
+						content: "";
+						display: block;
+						width: calc(100% - 24px);
+						height: 100%;
+						margin: auto;
+						position: absolute;
+						top: 0;
+						left: 0;
+						right: 0;
+						bottom: 0;
+						border-radius: 999px;
+						background: var(--accentedBg);
+					}
+				}
 			}
 		}
 	}