diff --git a/packages/backend/src/queue/processors/inbox.ts b/packages/backend/src/queue/processors/inbox.ts
index c346c043f..e430f3412 100644
--- a/packages/backend/src/queue/processors/inbox.ts
+++ b/packages/backend/src/queue/processors/inbox.ts
@@ -24,6 +24,7 @@ import type { UserPublickey } from "@/models/entities/user-publickey.js";
 import { shouldBlockInstance } from "@/misc/should-block-instance.js";
 import { verifySignature } from "@/remote/activitypub/check-fetch.js";
 import { tickInbox } from "@/metrics.js";
+import punycode from "punycode/";
 
 const logger = new Logger("inbox");
 
@@ -186,8 +187,8 @@ export default async (job: Bull.Job<InboxJobData>): Promise<string> => {
 		}
 	}
 
-	// Update stats
-	registerOrFetchInstanceDoc(authUser.user.host).then((i) => {
+	// Update stats and get instance metadata
+	const softwareName = await registerOrFetchInstanceDoc(authUser.user.host).then((i) => {
 		Instances.update(i.id, {
 			latestRequestReceivedAt: new Date(),
 			lastCommunicatedAt: new Date(),
@@ -199,8 +200,45 @@ export default async (job: Bull.Job<InboxJobData>): Promise<string> => {
 		instanceChart.requestReceived(i.host);
 		apRequestChart.inbox();
 		federationChart.inbox(i.host);
+
+		return i.softwareName;
 	});
 
+	if (activity.type === 'Like' && ["sharkey", "cutiekey"].includes(softwareName!)) {
+		const emoji = activity._misskey_reaction || activity.content || activity.name;
+		const custom = emoji.match(/^:([\w+-]+)(?:@\.)?:$/);
+		let remove;
+		if (custom) {
+			const name = (custom[1] as string).replaceAll("_", "").toLowerCase();
+			remove = name.includes("heart");
+		} else {
+			const root = punycode.ucs2.decode(emoji)[0];
+			remove = [
+				0x02661, // suit
+				0x02665, // suit black
+				0x02764, // heavy
+				0x1f496, // sparkling
+				0x1f497, // glowing
+				0x1f499, // blue
+				0x1f49a, // green
+				0x1f49b, // yellow
+				0x1f49c, // purple
+				0x1f5a4, // black
+				0x1f90d, // white
+				0x1f90e, // brown
+				0x1f9e1, // orange
+				0x1fa75, // light blue
+				0x1fa76, // grey
+				0x1fa77, // pink
+			].includes(root);
+		}
+		if (remove) {
+			activity._misskey_reaction = undefined;
+			activity.content = undefined;
+			activity.name = undefined;
+		}
+	}
+
 	const inbox = authUser.user.sharedInbox ?? authUser.user.inbox;
 	if (inbox !== null) {
 		const { host: inboxHost } = new URL(inbox);