Spoiler:it's very more complex story than you think

I don't know chinese but from what I understand Spoiler:



























So there is some big family shit or business (it's really hard to understand that without translation).
But I think that blonde guy had crush on brown hair guy (who I guess is older) before he met black hair. It looks like black hair confessed first but soon after brown hair also confessed. Mother of main character had some problem with black hair (I am not sure if it was about homosexuality, it could be about something else, bad crowd or even some business or family stuff). And she had quarrel with them on the street when she saw them together and black hair guy wanted to escape with him from her but she followed and she was hit by the car and she died. After that blonde guy went abroad and she came back few years later. He was in relationship with brown guy but he met with black guy and he slept with him (it was very strange situation it looks like kidnapping but blonde guy didn't have really problem with that).
Well the situation looks like blonde guy loved both of them (he kissed with black then with brown, slept with brown, than with black than again with brown). There is some kind of quandrangle relationship (there are also 2 women, seme-woman 1 and seme-woman 2).
Brown guy's woman is a friend of blonde guy but I am not completely sure about their relationship. Some one who knows chinese could better get what it's about.