Leaf Snow
Everyone is blaming Su including me for hiding truth about that incident and for that reason she is to be blamed. But what about Liuxi? he never said anything to her about his one night stand with some who he don't even clear about. If he has brought that topic she must have got the courage to tell him that she was the girl that night. Things would not be this messed up. I think both of them are to blame and they will eventually regret about this whole thing.