diff --git a/src/client/app/common/views/components/games/reversi/reversi.game.vue b/src/client/app/common/views/components/games/reversi/reversi.game.vue
index 3f481e8eb5..a7c918aa71 100644
--- a/src/client/app/common/views/components/games/reversi/reversi.game.vue
+++ b/src/client/app/common/views/components/games/reversi/reversi.game.vue
@@ -5,17 +5,17 @@
 
 	<div style="overflow: hidden; line-height: 28px;">
 		<p class="turn" v-if="!iAmPlayer && !game.isEnded">
-			<mfm :key="'turn:' + $options.filters.userName(turnUser)" :text="$t('@.reversi.turn-of', { name: $options.filters.userName(turnUser) })" :should-break="false" :plain-text="true" :custom-emojis="turnUser.emojis"/>
+			<mfm :key="'turn:' + $options.filters.userName(turnUser)" :text="$t('@.reversi.turn-of', { name: $options.filters.userName(turnUser) })" :plain="true" :custom-emojis="turnUser.emojis"/>
 			<mk-ellipsis/>
 		</p>
 		<p class="turn" v-if="logPos != logs.length">
-			<mfm :key="'past-turn-of:' + $options.filters.userName(turnUser)" :text="$t('@.reversi.past-turn-of', { name: $options.filters.userName(turnUser) })" :should-break="false" :plain-text="true" :custom-emojis="turnUser.emojis"/>
+			<mfm :key="'past-turn-of:' + $options.filters.userName(turnUser)" :text="$t('@.reversi.past-turn-of', { name: $options.filters.userName(turnUser) })" :plain="true" :custom-emojis="turnUser.emojis"/>
 		</p>
 		<p class="turn1" v-if="iAmPlayer && !game.isEnded && !isMyTurn">{{ $t('@.reversi.opponent-turn') }}<mk-ellipsis/></p>
 		<p class="turn2" v-if="iAmPlayer && !game.isEnded && isMyTurn" v-animate-css="{ classes: 'tada', iteration: 'infinite' }">{{ $t('@.reversi.my-turn') }}</p>
 		<p class="result" v-if="game.isEnded && logPos == logs.length">
 			<template v-if="game.winner">
-				<mfm :key="'won'" :text="$t('@.reversi.won', { name: $options.filters.userName(game.winner) })" :should-break="false" :plain-text="true" :custom-emojis="game.winner.emojis"/>
+				<mfm :key="'won'" :text="$t('@.reversi.won', { name: $options.filters.userName(game.winner) })" :plain="true" :custom-emojis="game.winner.emojis"/>
 				<span v-if="game.surrendered != null"> ({{ $t('surrendered') }})</span>
 			</template>
 			<template v-else>{{ $t('@.reversi.drawn') }}</template>
diff --git a/src/client/app/common/views/components/mfm.ts b/src/client/app/common/views/components/mfm.ts
index fa798504c7..561c3d8e30 100644
--- a/src/client/app/common/views/components/mfm.ts
+++ b/src/client/app/common/views/components/mfm.ts
@@ -22,11 +22,11 @@ export default Vue.component('misskey-flavored-markdown', {
 			type: String,
 			required: true
 		},
-		shouldBreak: {
+		plain: {
 			type: Boolean,
-			default: true
+			default: false
 		},
-		plainText: {
+		nowrap: {
 			type: Boolean,
 			default: false
 		},
@@ -50,7 +50,7 @@ export default Vue.component('misskey-flavored-markdown', {
 	render(createElement) {
 		if (this.text == null || this.text == '') return;
 
-		const ast = (this.plainText ? parsePlain : parse)(this.text);
+		const ast = (this.plain ? parsePlain : parse)(this.text);
 
 		let bigCount = 0;
 		let motionCount = 0;
@@ -60,7 +60,7 @@ export default Vue.component('misskey-flavored-markdown', {
 				case 'text': {
 					const text = token.node.props.text.replace(/(\r\n|\n|\r)/g, '\n');
 
-					if (this.shouldBreak) {
+					if (!this.plain) {
 						const x = text.split('\n')
 							.map(t => t == '' ? [createElement('br')] : [createElement('span', t), createElement('br')]);
 						x[x.length - 1].pop();
@@ -270,7 +270,7 @@ export default Vue.component('misskey-flavored-markdown', {
 						},
 						props: {
 							customEmojis: this.customEmojis || customEmojis,
-							normal: this.plainText
+							normal: this.plain
 						}
 					})];
 				}
diff --git a/src/client/app/common/views/components/misskey-flavored-markdown.vue b/src/client/app/common/views/components/misskey-flavored-markdown.vue
index a0ecbecbb2..64496f9c84 100644
--- a/src/client/app/common/views/components/misskey-flavored-markdown.vue
+++ b/src/client/app/common/views/components/misskey-flavored-markdown.vue
@@ -1,5 +1,5 @@
 <template>
-<mfm-core v-bind="$attrs" class="havbbuyv" :class="{ plain: $attrs['plain-text'] }" v-once/>
+<mfm-core v-bind="$attrs" class="havbbuyv" :class="{ nowrap: $attrs['nowrap'] }" v-once/>
 </template>
 
 <script lang="ts">
@@ -17,7 +17,7 @@ export default Vue.extend({
 .havbbuyv
 	white-space pre-wrap
 
-	&.plain
+	&.nowrap
 		white-space pre
 
 	>>> .title
diff --git a/src/client/app/common/views/components/poll.vue b/src/client/app/common/views/components/poll.vue
index dc3aaa34f3..bd5eeaf832 100644
--- a/src/client/app/common/views/components/poll.vue
+++ b/src/client/app/common/views/components/poll.vue
@@ -5,7 +5,7 @@
 			<div class="backdrop" :style="{ 'width': `${showResult ? (choice.votes / total * 100) : 0}%` }"></div>
 			<span>
 				<template v-if="choice.isVoted"><fa icon="check"/></template>
-				<mfm :text="choice.text" :should-break="false" :plain-text="true" :custom-emojis="note.emojis"/>
+				<mfm :text="choice.text" :plain="true" :custom-emojis="note.emojis"/>
 				<span class="votes" v-if="showResult">({{ $t('vote-count').replace('{}', choice.votes) }})</span>
 			</span>
 		</li>
diff --git a/src/client/app/common/views/components/user-list.vue b/src/client/app/common/views/components/user-list.vue
index 466be41506..69cb65b445 100644
--- a/src/client/app/common/views/components/user-list.vue
+++ b/src/client/app/common/views/components/user-list.vue
@@ -16,7 +16,7 @@
 					<p class="username">@{{ user | acct }}</p>
 				</div>
 				<div class="description" v-if="user.description" :title="user.description">
-					<mfm :text="user.description" :is-note="false" :author="user" :i="$store.state.i" :custom-emojis="user.emojis" :should-break="false" :plain-text="true"/>
+					<mfm :text="user.description" :is-note="false" :author="user" :i="$store.state.i" :custom-emojis="user.emojis" :plain="true" :nowrap="true"/>
 				</div>
 				<mk-follow-button class="follow-button" v-if="$store.getters.isSignedIn && user.id != $store.state.i.id" :user="user" mini/>
 			</div>
diff --git a/src/client/app/common/views/components/user-name.vue b/src/client/app/common/views/components/user-name.vue
index 3959193eb4..6aca36acbd 100644
--- a/src/client/app/common/views/components/user-name.vue
+++ b/src/client/app/common/views/components/user-name.vue
@@ -1,5 +1,5 @@
 <template>
-<mfm :text="user.name || user.username" :should-break="false" :plain-text="true" :custom-emojis="user.emojis"/>
+<mfm :text="user.name || user.username" :plain="true" :nowrap="true" :custom-emojis="user.emojis"/>
 </template>
 
 <script lang="ts">
diff --git a/src/client/app/common/views/deck/deck.notification.vue b/src/client/app/common/views/deck/deck.notification.vue
index 27a2dffef5..522f9b0d35 100644
--- a/src/client/app/common/views/deck/deck.notification.vue
+++ b/src/client/app/common/views/deck/deck.notification.vue
@@ -12,7 +12,7 @@
 			</header>
 			<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
 				<fa icon="quote-left"/>
-					<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+					<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 				<fa icon="quote-right"/>
 			</router-link>
 		</div>
@@ -30,7 +30,7 @@
 			</header>
 			<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note.renote)">
 				<fa icon="quote-left"/>
-					<mfm :text="getNoteSummary(notification.note.renote)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.renote.emojis"/>
+					<mfm :text="getNoteSummary(notification.note.renote)" :plain="true" :custom-emojis="notification.note.renote.emojis"/>
 				<fa icon="quote-right"/>
 			</router-link>
 		</div>
@@ -74,7 +74,7 @@
 			</header>
 			<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
 				<fa icon="quote-left"/>
-					<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+					<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 				<fa icon="quote-right"/>
 			</router-link>
 		</div>
diff --git a/src/client/app/common/views/deck/deck.user-column.vue b/src/client/app/common/views/deck/deck.user-column.vue
index c508f3f69f..8ab61f2047 100644
--- a/src/client/app/common/views/deck/deck.user-column.vue
+++ b/src/client/app/common/views/deck/deck.user-column.vue
@@ -30,7 +30,7 @@
 			<div class="fields" v-if="user.fields">
 				<dl class="field" v-for="(field, i) in user.fields" :key="i">
 					<dt class="name">
-						<mfm :text="field.name" :should-break="false" :plain-text="true" :custom-emojis="user.emojis"/>
+						<mfm :text="field.name" :plain="true" :custom-emojis="user.emojis"/>
 					</dt>
 					<dd class="value">
 						<mfm :text="field.value" :author="user" :i="$store.state.i" :custom-emojis="user.emojis"/>
diff --git a/src/client/app/common/views/pages/follow.vue b/src/client/app/common/views/pages/follow.vue
index f6a11a7b4f..f08ddf2642 100644
--- a/src/client/app/common/views/pages/follow.vue
+++ b/src/client/app/common/views/pages/follow.vue
@@ -1,7 +1,7 @@
 <template>
 <div class="syxhndwprovvuqhmyvveewmbqayniwkv" v-if="!fetching">
 	<div class="signed-in-as">
-		<mfm :text="$t('signed-in-as').replace('{}', myName)" :should-break="false" :plain-text="true" :custom-emojis="$store.state.i.emojis"/>
+		<mfm :text="$t('signed-in-as').replace('{}', myName)" :plain="true" :custom-emojis="$store.state.i.emojis"/>
 	</div>
 	<main>
 		<div class="banner" :style="bannerStyle"></div>
diff --git a/src/client/app/desktop/views/components/notifications.vue b/src/client/app/desktop/views/components/notifications.vue
index 6a8bc48ff2..aa8b023993 100644
--- a/src/client/app/desktop/views/components/notifications.vue
+++ b/src/client/app/desktop/views/components/notifications.vue
@@ -24,7 +24,7 @@
 							</p>
 							<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
 								<fa icon="quote-left"/>
-									<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+									<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 								<fa icon="quote-right"/>
 							</router-link>
 						</div>
@@ -40,7 +40,7 @@
 							</p>
 							<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note.renote)">
 								<fa icon="quote-left"/>
-									<mfm :text="getNoteSummary(notification.note.renote)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.renote.emojis"/>
+									<mfm :text="getNoteSummary(notification.note.renote)" :plain="true" :custom-emojis="notification.note.renote.emojis"/>
 								<fa icon="quote-right"/>
 							</router-link>
 						</div>
@@ -55,7 +55,7 @@
 								</router-link>
 							</p>
 							<router-link class="note-preview" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
-								<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+								<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 							</router-link>
 						</div>
 					</template>
@@ -91,7 +91,7 @@
 								</router-link>
 							</p>
 							<router-link class="note-preview" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
-								<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+								<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 							</router-link>
 						</div>
 					</template>
@@ -105,7 +105,7 @@
 								</router-link>
 							</p>
 							<router-link class="note-preview" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
-								<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+								<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 							</router-link>
 						</div>
 					</template>
@@ -118,7 +118,7 @@
 							</router-link></p>
 							<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
 								<fa icon="quote-left"/>
-									<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+									<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 								<fa icon="quote-right"/>
 							</router-link>
 						</div>
diff --git a/src/client/app/desktop/views/home/user/user.header.vue b/src/client/app/desktop/views/home/user/user.header.vue
index 52a5165c3f..ca4ad0802c 100644
--- a/src/client/app/desktop/views/home/user/user.header.vue
+++ b/src/client/app/desktop/views/home/user/user.header.vue
@@ -28,7 +28,7 @@
 		<div class="fields" v-if="user.fields">
 			<dl class="field" v-for="(field, i) in user.fields" :key="i">
 				<dt class="name">
-					<mfm :text="field.name" :should-break="false" :plain-text="true" :custom-emojis="user.emojis"/>
+					<mfm :text="field.name" :plain="true" :custom-emojis="user.emojis"/>
 				</dt>
 				<dd class="value">
 					<mfm :text="field.value" :author="user" :i="$store.state.i" :custom-emojis="user.emojis"/>
diff --git a/src/client/app/mobile/views/components/notification.vue b/src/client/app/mobile/views/components/notification.vue
index 9dae95c9b1..7b1030122f 100644
--- a/src/client/app/mobile/views/components/notification.vue
+++ b/src/client/app/mobile/views/components/notification.vue
@@ -10,7 +10,7 @@
 			</header>
 			<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
 				<fa icon="quote-left"/>
-					<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+					<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 				<fa icon="quote-right"/>
 			</router-link>
 		</div>
@@ -26,7 +26,7 @@
 			</header>
 			<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note.renote)">
 				<fa icon="quote-left"/>
-					<mfm :text="getNoteSummary(notification.note.renote)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.renote.emojis"/>
+					<mfm :text="getNoteSummary(notification.note.renote)" :plain="true" :custom-emojis="notification.note.renote.emojis"/>
 				<fa icon="quote-right"/>
 			</router-link>
 		</div>
@@ -64,7 +64,7 @@
 			</header>
 			<router-link class="note-ref" :to="notification.note | notePage" :title="getNoteSummary(notification.note)">
 				<fa icon="quote-left"/>
-					<mfm :text="getNoteSummary(notification.note)" :should-break="false" :plain-text="true" :custom-emojis="notification.note.emojis"/>
+					<mfm :text="getNoteSummary(notification.note)" :plain="true" :custom-emojis="notification.note.emojis"/>
 				<fa icon="quote-right"/>
 			</router-link>
 		</div>
diff --git a/src/client/app/mobile/views/pages/settings.vue b/src/client/app/mobile/views/pages/settings.vue
index da01ef6221..c24a56be7b 100644
--- a/src/client/app/mobile/views/pages/settings.vue
+++ b/src/client/app/mobile/views/pages/settings.vue
@@ -3,7 +3,7 @@
 	<template #header><span style="margin-right:4px;"><fa icon="cog"/></span>{{ $t('@.settings') }}</template>
 	<main>
 		<div class="signed-in-as" :class="{ shadow: $store.state.device.useShadow, round: $store.state.device.roundedCorners }">
-			<mfm :text="$t('signed-in-as').replace('{}', name)" :should-break="false" :plain-text="true" :custom-emojis="$store.state.i.emojis"/>
+			<mfm :text="$t('signed-in-as').replace('{}', name)" :plain="true" :custom-emojis="$store.state.i.emojis"/>
 		</div>
 
 		<x-settings/>
diff --git a/src/client/app/mobile/views/pages/user/index.vue b/src/client/app/mobile/views/pages/user/index.vue
index f8f4719a68..2e4998178f 100644
--- a/src/client/app/mobile/views/pages/user/index.vue
+++ b/src/client/app/mobile/views/pages/user/index.vue
@@ -28,7 +28,7 @@
 				<div class="fields" v-if="user.fields">
 					<dl class="field" v-for="(field, i) in user.fields" :key="i">
 						<dt class="name">
-							<mfm :text="field.name" :should-break="false" :plain-text="true" :custom-emojis="user.emojis"/>
+							<mfm :text="field.name" :plain="true" :custom-emojis="user.emojis"/>
 						</dt>
 						<dd class="value">
 							<mfm :text="field.value" :author="user" :i="$store.state.i" :custom-emojis="user.emojis"/>