Wonder who is that glasses guy on the cover??

Brother of yul I guess because he was also wearing glasses

If I'm correct he is Choi Yuel's brother. Maybe. Anyway the whole story is a series of violence. At least it seems to me from the Chinese version. There are 45 chapters on the site "77mh.com". I went trough a few chapters, honestly, I did not feel good. If anyone is interested, here: http://www.77mh.com/colist_238967.html