This is the logo used by bubble.
<p><b>Original: </b> <a href="https://en.wikipedia.org/wiki/SM_Entertainment" class="extiw" title="w:SM Entertainment">SM Entertainment</a>
</p>
<b>Vectorization: </b> <a href="//commons.wikimedia.org/w/index.php?title=User:ReVeluv02&amp;action=edit&amp;redlink=1" class="new" title="User:ReVeluv02 (page does not exist)">ReVeluv02</a>
<a rel="nofollow" class="external free" href="https://twitter.com/dearu_bubble">https://twitter.com/dearu_bubble</a>