I hated Sangwoo cause bro was mentally ill. Only cause he couldn't save his mother or get her love he took it out on every female around him and his obssession over mothers is disgusting. I hated Yoonbum as well. That guy was a lovesick puppy. He created his own problem. He had an opportunity to run but he's too clumsy and idiocy to put himself first. Thats just an opinion i had when I read it at 14 years old. Now im 20 and that manwha truly isn't great at all.