The first time I read this manga I didn't like it, for pretty obvious reasons. But now that I've read it a second time I understand a little more than I did at first. The uke and the seme both love each other, hence why the seme is depressed after the uke stops having sex with him, and why he couldn't resist the uke after a year had passed. The uke was a bit more difficult for me, at first he just seemed like a manipulative asshole, and in a way he is, but you can tell if you observe closely enough, the expressions he makes when he finds out that the seme is trying to settle down with one person, while they're talking at the bar. It's hard but it gives him away. And when he succesfully makes the seme sleep with him after one year he's very happy, because he succeeded in making him his again, kind of like "He says he's changed, but he can't resist me". Good read, a bit twisted, but it's refreshing. However, don't cheat on your bf/gf or wife/husband! That's low!
Michi Dzure