diff --git a/spec/services/emoji_react_service_spec.rb b/spec/services/emoji_react_service_spec.rb
index 629a7818d4..ed19538098 100644
--- a/spec/services/emoji_react_service_spec.rb
+++ b/spec/services/emoji_react_service_spec.rb
@@ -47,6 +47,7 @@ RSpec.describe EmojiReactService, type: :service do
     it 'react with emoji' do
       expect(subject.count).to eq 1
       expect(subject.pluck(:name)).to contain_exactly('😂')
+      expect(EmojiReaction.where(status: status).count).to eq 2
     end
   end
 
@@ -56,6 +57,7 @@ RSpec.describe EmojiReactService, type: :service do
     it 'react with emoji' do
       expect(subject.count).to eq 1
       expect(subject.first.name).to eq '😀'
+      expect(EmojiReaction.where(status: status).count).to eq 2
     end
   end
 
diff --git a/spec/services/un_emoji_react_service_spec.rb b/spec/services/un_emoji_react_service_spec.rb
new file mode 100644
index 0000000000..393e83b2e0
--- /dev/null
+++ b/spec/services/un_emoji_react_service_spec.rb
@@ -0,0 +1,139 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe UnEmojiReactService, type: :service do
+  subject do
+    described_class.new.call(sender.id, status.id, emoji_reaction)
+    EmojiReaction.where(status: status, account: sender)
+  end
+
+  let!(:emoji_reaction) { nil }
+  let(:sender) { Fabricate(:user).account }
+  let(:author) { Fabricate(:user).account }
+  let(:status) { Fabricate(:status, account: author) }
+
+  context 'when a simple case' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: '😀') }
+
+    it 'unreact with emoji' do
+      expect(subject.count).to eq 0
+    end
+  end
+
+  context 'when no emoji reactions' do
+    it 'unreact with emoji' do
+      expect(subject.count).to eq 0
+    end
+  end
+
+  context 'with custom emoji of local' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: 'ohagi', custom_emoji: custom_emoji) }
+    let(:custom_emoji) { Fabricate(:custom_emoji, shortcode: 'ohagi') }
+
+    it 'react with emoji' do
+      expect(subject.count).to eq 0
+    end
+  end
+
+  context 'with custom emoji of remote' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: 'ohagi', custom_emoji: custom_emoji) }
+    let(:custom_emoji) { Fabricate(:custom_emoji, shortcode: 'ohagi', domain: 'foo.bar', uri: 'https://foo.bar/emoji/ohagi') }
+
+    it 'react with emoji' do
+      expect(subject.count).to eq 0
+    end
+  end
+
+  context 'when other account already set' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: '😀') }
+
+    before { Fabricate(:emoji_reaction, status: status, name: '😀') }
+
+    it 'unreact with emoji' do
+      expect(subject.count).to eq 0
+      expect(EmojiReaction.where(status: status).count).to eq 1
+    end
+  end
+
+  context 'when this account already set multiple emojis' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: '😀') }
+
+    before do
+      Fabricate(:emoji_reaction, account: sender, status: status, name: '😂')
+      Fabricate(:emoji_reaction, account: sender, status: status, name: '🚗')
+    end
+
+    it 'unreact with emoji' do
+      expect(subject.count).to eq 2
+      expect(subject.pluck(:name)).to contain_exactly('😂', '🚗')
+    end
+  end
+
+  context 'with remove all emojis' do
+    before do
+      Fabricate(:emoji_reaction, account: sender, status: status, name: '😀')
+      Fabricate(:emoji_reaction, account: sender, status: status, name: '😂')
+      Fabricate(:emoji_reaction, account: sender, status: status, name: '🚗')
+    end
+
+    it 'react with emoji' do
+      expect(subject.count).to eq 0
+    end
+  end
+
+  context 'when has remote followers' do
+    let!(:bob) { Fabricate(:account, domain: 'foo.bar', uri: 'https://foo.bar/actor', inbox_url: 'https://foo.bar/inbox', protocol: 'activitypub') }
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: '😀') }
+
+    before do
+      bob.follow!(author)
+      stub_request(:post, 'https://foo.bar/inbox')
+    end
+
+    it 'react with emoji' do
+      expect(subject.count).to eq 0
+      expect(a_request(:post, 'https://foo.bar/inbox').with(body: hash_including({
+        type: 'Undo',
+        actor: ActivityPub::TagManager.instance.uri_for(sender),
+        content: '😀',
+      }))).to have_been_made.once
+    end
+  end
+
+  context 'when has relay server' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: '😀') }
+
+    before do
+      Fabricate(:relay, inbox_url: 'https://foo.bar/inbox', state: :accepted)
+      stub_request(:post, 'https://foo.bar/inbox')
+    end
+
+    it 'react with emoji' do
+      expect(subject.count).to eq 0
+      expect(a_request(:post, 'https://foo.bar/inbox').with(body: hash_including({
+        type: 'Undo',
+        actor: ActivityPub::TagManager.instance.uri_for(sender),
+        content: '😀',
+      }))).to have_been_made.once
+    end
+  end
+
+  context 'when has friend server' do
+    let(:emoji_reaction) { Fabricate(:emoji_reaction, account: sender, status: status, name: '😀') }
+
+    before do
+      Fabricate(:friend_domain, inbox_url: 'https://foo.bar/inbox', active_state: :accepted, pseudo_relay: true)
+      stub_request(:post, 'https://foo.bar/inbox')
+    end
+
+    it 'react with emoji' do
+      expect(subject.count).to eq 0
+      expect(a_request(:post, 'https://foo.bar/inbox').with(body: hash_including({
+        type: 'Undo',
+        actor: ActivityPub::TagManager.instance.uri_for(sender),
+        content: '😀',
+      }))).to have_been_made.once
+    end
+  end
+end