Hkopinion quoted: She (Cheung Yu San)thinks that she is so attractive that her classmate will fall in love with her but in fact, he likes his teacher and commits suicide.

Correct me if I'm wrong but I remember she said that they were just friends. When Peter suspected that it was her that cause her classmate to sucide, she quickly explain that it wasn't. And what did she do in order for you to think that she think that she was attractive? However, it was very funny how she thought that Joe likes her. I remember after many times Joe turn her down, she still approach him! Did she support Helen to go with him later on? I can't remember. I just remember Helen finally accepts him.