diff --git a/packages/client/src/components/MkCwButton.vue b/packages/client/src/components/MkCwButton.vue
index 35af48874a..659cb1fbb6 100644
--- a/packages/client/src/components/MkCwButton.vue
+++ b/packages/client/src/components/MkCwButton.vue
@@ -66,5 +66,41 @@ const toggle = () => {
 		background: var(--cwFg) !important;
 		color: var(--cwBg) !important;
 	}
+
+	&.fade {
+		display: block;
+		position: absolute;
+		bottom: 0;
+		left: 0;
+		width: 100%;
+		> span {
+			display: inline-block;
+			background: var(--panel);
+			padding: 0.4em 1em;
+			font-size: 0.8em;
+			border-radius: 999px;
+			box-shadow: 0 2px 6px rgb(0 0 0 / 20%);
+		}
+		&:hover {
+			> span {
+				background: var(--panelHighlight);
+			}
+		}
+	}
+	&.showLess {
+		width: 100%;
+		margin-top: 1em;
+		position: sticky;
+		bottom: var(--stickyBottom);
+
+		> span {
+			display: inline-block;
+			background: var(--panel);
+			padding: 6px 10px;
+			font-size: 0.8em;
+			border-radius: 999px;
+			box-shadow: 0 0 7px 7px var(--bg);
+		}
+	}
 }
 </style>
diff --git a/packages/client/src/components/MkNotification.vue b/packages/client/src/components/MkNotification.vue
index c909873a55..2c7281dbe5 100644
--- a/packages/client/src/components/MkNotification.vue
+++ b/packages/client/src/components/MkNotification.vue
@@ -89,7 +89,7 @@
 				/>
 			</div>
 		</div>
-		<div class="tail">
+		<div class="tail" :class="{ collapsed }">
 			<header>
 				<span v-if="notification.type === 'pollEnded'">{{
 					i18n.ts._notification.pollEnded
@@ -112,11 +112,11 @@
 				v-if="notification.type === 'reaction'"
 				class="text"
 				:to="notePage(notification.note)"
-				:title="getNoteSummary(notification.note)"
+				:title="summary"
 			>
 				<i class="ph-quotes ph-fill ph-lg"></i>
 				<Mfm
-					:text="getNoteSummary(notification.note)"
+					:text="summary"
 					:plain="true"
 					:nowrap="!full"
 					:custom-emojis="notification.note.emojis"
@@ -142,10 +142,10 @@
 				v-if="notification.type === 'reply'"
 				class="text"
 				:to="notePage(notification.note)"
-				:title="getNoteSummary(notification.note)"
+				:title="summary"
 			>
 				<Mfm
-					:text="getNoteSummary(notification.note)"
+					:text="summary"
 					:plain="true"
 					:nowrap="!full"
 					:custom-emojis="notification.note.emojis"
@@ -155,10 +155,10 @@
 				v-if="notification.type === 'mention'"
 				class="text"
 				:to="notePage(notification.note)"
-				:title="getNoteSummary(notification.note)"
+				:title="summary"
 			>
 				<Mfm
-					:text="getNoteSummary(notification.note)"
+					:text="summary"
 					:plain="true"
 					:nowrap="!full"
 					:custom-emojis="notification.note.emojis"
@@ -168,10 +168,10 @@
 				v-if="notification.type === 'quote'"
 				class="text"
 				:to="notePage(notification.note)"
-				:title="getNoteSummary(notification.note)"
+				:title="summary"
 			>
 				<Mfm
-					:text="getNoteSummary(notification.note)"
+					:text="summary"
 					:plain="true"
 					:nowrap="!full"
 					:custom-emojis="notification.note.emojis"
@@ -181,11 +181,11 @@
 				v-if="notification.type === 'pollVote'"
 				class="text"
 				:to="notePage(notification.note)"
-				:title="getNoteSummary(notification.note)"
+				:title="summary"
 			>
 				<i class="ph-quotes ph-fill ph-lg"></i>
 				<Mfm
-					:text="getNoteSummary(notification.note)"
+					:text="summary"
 					:plain="true"
 					:nowrap="!full"
 					:custom-emojis="notification.note.emojis"
@@ -196,11 +196,11 @@
 				v-if="notification.type === 'pollEnded'"
 				class="text"
 				:to="notePage(notification.note)"
-				:title="getNoteSummary(notification.note)"
+				:title="summary"
 			>
 				<i class="ph-quotes ph-fill ph-lg"></i>
 				<Mfm
-					:text="getNoteSummary(notification.note)"
+					:text="summary"
 					:plain="true"
 					:nowrap="!full"
 					:custom-emojis="notification.note.emojis"
@@ -264,6 +264,7 @@
 			<span v-if="notification.type === 'app'" class="text">
 				<Mfm :text="notification.body" :nowrap="!full" />
 			</span>
+			<xShowMoreButton v-if="isLong" v-model="collapsed"></xShowMoreButton>
 		</div>
 	</div>
 </template>
@@ -274,6 +275,7 @@ import * as misskey from "calckey-js";
 import XReactionIcon from "@/components/MkReactionIcon.vue";
 import MkFollowButton from "@/components/MkFollowButton.vue";
 import XReactionTooltip from "@/components/MkReactionTooltip.vue";
+import XShowMoreButton from "./MkShowMoreButton.vue";
 import { getNoteSummary } from "@/scripts/get-note-summary";
 import { notePage } from "@/filters/note";
 import { userPage } from "@/filters/user";
@@ -299,12 +301,19 @@ const props = withDefaults(
 const elRef = ref<HTMLElement>(null);
 const reactionRef = ref(null);
 
+const summary = getNoteSummary(props.notification.note);
+
 const showEmojiReactions =
 	defaultStore.state.enableEmojiReactions ||
 	defaultStore.state.showEmojisInReactionNotifications;
 const defaultReaction = ["⭐", "👍", "❤️"].includes(instance.defaultReaction)
 	? instance.defaultReaction
 	: "⭐";
+const isLong = (summary.split("\n").length > 3 || summary.length > 200);
+const collapsed = $ref(isLong);
+
+
+
 
 let readObserver: IntersectionObserver | undefined;
 let connection;
@@ -486,6 +495,7 @@ useTooltip(reactionRef, (showing) => {
 	}
 
 	> .tail {
+		position: relative;
 		flex: 1;
 		min-width: 0;
 
@@ -526,6 +536,17 @@ useTooltip(reactionRef, (showing) => {
 				margin-left: 4px;
 			}
 		}
+		&.collapsed > .text {
+			display: block;
+			position: relative;
+			max-height: calc(4em + 50px);
+			overflow: hidden;
+			mask: linear-gradient(black calc(100% - 64px), transparent);
+			-webkit-mask: linear-gradient(
+				black calc(100% - 64px),
+				transparent
+			);
+		}
 	}
 }
 </style>
diff --git a/packages/client/src/components/MkShowMoreButton.vue b/packages/client/src/components/MkShowMoreButton.vue
new file mode 100644
index 0000000000..3516d6f43c
--- /dev/null
+++ b/packages/client/src/components/MkShowMoreButton.vue
@@ -0,0 +1,68 @@
+<template>
+	<button
+		v-if="modelValue"
+		class="fade _button"
+		@click.stop="toggle"
+	>
+		<span>{{ i18n.ts.showMore }}</span>
+	</button>
+	<button
+		v-if="!modelValue"
+		class="showLess _button"
+		@click.stop="toggle"
+	>
+		<span>{{ i18n.ts.showLess }}</span>
+	</button>
+</template>
+<script lang="ts" setup>
+import { i18n } from "@/i18n";
+
+const props = defineProps<{
+	modelValue: boolean;
+}>();
+
+const emit = defineEmits<{
+	(ev: "update:modelValue", v: boolean): void;
+}>();
+
+const toggle = () => {
+	emit("update:modelValue", !props.modelValue);
+};
+</script>
+<style lang="scss" scoped>
+.fade {
+	display: block;
+	position: absolute;
+	bottom: 0;
+	left: 0;
+	width: 100%;
+	> span {
+		display: inline-block;
+		background: var(--panel);
+		padding: 0.4em 1em;
+		font-size: 0.8em;
+		border-radius: 999px;
+		box-shadow: 0 2px 6px rgb(0 0 0 / 20%);
+	}
+	&:hover {
+		> span {
+			background: var(--panelHighlight);
+		}
+	}
+}
+.showLess {
+	width: 100%;
+	margin-top: 1em;
+	position: sticky;
+	bottom: var(--stickyBottom);
+
+	> span {
+		display: inline-block;
+		background: var(--panel);
+		padding: 6px 10px;
+		font-size: 0.8em;
+		border-radius: 999px;
+		box-shadow: 0 0 7px 7px var(--bg);
+	}
+}
+</style>
diff --git a/packages/client/src/components/MkSubNoteContent.vue b/packages/client/src/components/MkSubNoteContent.vue
index a345b23f54..a1f7cc1b98 100644
--- a/packages/client/src/components/MkSubNoteContent.vue
+++ b/packages/client/src/components/MkSubNoteContent.vue
@@ -97,20 +97,7 @@
 					</div>
 				</template>
 			</div>
-			<button
-				v-if="isLong && collapsed"
-				class="fade _button"
-				@click.stop="collapsed = false"
-			>
-				<span>{{ i18n.ts.showMore }}</span>
-			</button>
-			<button
-				v-if="isLong && !collapsed"
-				class="showLess _button"
-				@click.stop="collapsed = true"
-			>
-				<span>{{ i18n.ts.showLess }}</span>
-			</button>
+			<XShowMoreButton v-if="isLong" v-model="collapsed"></XShowMoreButton>
 			<XCwButton v-if="note.cw" v-model="showContent" :note="note" />
 		</div>
 	</div>
@@ -124,6 +111,7 @@ import XNoteSimple from "@/components/MkNoteSimple.vue";
 import XMediaList from "@/components/MkMediaList.vue";
 import XPoll from "@/components/MkPoll.vue";
 import MkUrlPreview from "@/components/MkUrlPreview.vue";
+import XShowMoreButton from "./MkShowMoreButton.vue";
 import XCwButton from "@/components/MkCwButton.vue";
 import { extractUrlFromMfm } from "@/scripts/extract-url-from-mfm";
 import { i18n } from "@/i18n";
@@ -146,6 +134,7 @@ const isLong =
 	props.note.text != null &&
 	(props.note.text.split("\n").length > 9 || props.note.text.length > 500);
 const collapsed = $ref(props.note.cw == null && isLong);
+
 const urls = props.note.text
 	? extractUrlFromMfm(mfm.parse(props.note.text)).slice(0, 5)
 	: null;
@@ -264,43 +253,6 @@ let showContent = $ref(false);
 					top: 40px;
 				}
 			}
-
-			:deep(.fade) {
-				display: block;
-				position: absolute;
-				bottom: 0;
-				left: 0;
-				width: 100%;
-				> span {
-					display: inline-block;
-					background: var(--panel);
-					padding: 0.4em 1em;
-					font-size: 0.8em;
-					border-radius: 999px;
-					box-shadow: 0 2px 6px rgb(0 0 0 / 20%);
-				}
-				&:hover {
-					> span {
-						background: var(--panelHighlight);
-					}
-				}
-			}
-		}
-
-		:deep(.showLess) {
-			width: 100%;
-			margin-top: 1em;
-			position: sticky;
-			bottom: var(--stickyBottom);
-
-			> span {
-				display: inline-block;
-				background: var(--panel);
-				padding: 6px 10px;
-				font-size: 0.8em;
-				border-radius: 999px;
-				box-shadow: 0 0 7px 7px var(--bg);
-			}
 		}
 	}
 }
diff --git a/packages/client/src/components/MkUserPreview.vue b/packages/client/src/components/MkUserPreview.vue
index 1e6db14423..ddfd39f14a 100644
--- a/packages/client/src/components/MkUserPreview.vue
+++ b/packages/client/src/components/MkUserPreview.vue
@@ -55,20 +55,7 @@
 						:custom-emojis="user.emojis"
 					/>
 				</div>
-				<button
-					v-if="isLong && collapsed"
-					class="fade _button"
-					@click.stop="collapsed = false"
-				>
-					<span>{{ i18n.ts.showMore }}</span>
-				</button>
-				<button
-					v-if="isLong && !collapsed"
-					class="showLess _button"
-					@click.stop="collapsed = true"
-				>
-					<span>{{ i18n.ts.showLess }}</span>
-				</button>
+				<XShowMoreButton v-if="isLong" v-model="collapsed"></XShowMoreButton>
 				<div v-if="user.fields.length > 0" class="fields">
 					<dl
 						v-for="(field, i) in user.fields"
@@ -128,6 +115,7 @@ import * as Acct from "calckey-js/built/acct";
 import type * as misskey from "calckey-js";
 import MkFollowButton from "@/components/MkFollowButton.vue";
 import { userPage } from "@/filters/user";
+import XShowMoreButton from "./MkShowMoreButton.vue";
 import * as os from "@/os";
 import { $i } from "@/account";
 import { i18n } from "@/i18n";