<my-subscribe-button size="small">
  <div class="btn-group-subscribe btn subscribe-button">
    <button type="button" role="button" class="btn btn-sm ng-star-inserted">登録</button>
    <button type="button" role="button" class="btn btn-sm ng-star-inserted">リモート登録</button>
    <button type="button" role="button" class="btn btn-sm ng-star-inserted">RSSで登録</button>
  </div>
</my-subscribe-button>