I'm so conflicted. I mean they're the main couple so of course they're absolutely adorable...

He didn't? Reiichi never cheated.. Right?? (⊙…⊙ )

I thought the woman leaving his apartment was supposed to mean that he cheated on him... I could be wrong

Yeah, he cheated on him. But it's just he didn't have the idea about how serious he is with uke, he never been on serious relationship before. and uke forgive him anyway, so maybe that's all okay in the end.

Reiichi was actually in a very serious relationship with Chun, who he was engaged to, and who he always cheated on as well.

is that relationship really serious? LOL
I mean, is that cheated things counted as he being serious about his relationship with Chun, pfftt..

but, I am glad that he stop cheating and serious with this relationship.

Haha, I get your point, but my view is that going so far as to be engaged is to be in a serious relationship. I mean, people can be in a serious relationship (engaged, married, committed) and still cheat. But yeah, Reiichi was never truly "serious" about his feelings.

ikr, having relationship never packed someone as being serious with the other half (partner).

Reiichi was never in a relationship with Chun. It was all one-sided persistence on Reiichi's part.

Ahhh, actually, Reichii was never actually engaged to Chun. He just kept asking him, but Chun wasn't interested so he always refused Shiratori

As for Shiratori's relationship with Fukurou, I don't think they were officially together when the lady was there...I could be wrong though! This is from my memory, because I haven't read this story in a while T▽T