from the beginning I know it is not keichi’s fault actually I think shingo is the one who needs to rearrange his feelings and that is what happend and we will see what he wants to say next chapter , and about keichi I don’t know why most of the readers hate him ! he clearly said to shingo that he loves him and didn’t want to break up and about that kiss with angleno from what we saw in that chapter and one before it is pretty obvious that his target is yuujin or ei so why everone blame him ! and I can understand that cold attitude in the last page , what to expect from someone when he sees the one who hurt him although he still loves him but it is a mixed feelings and that is the outcome I mean in real life there are people who react like that . just hope sensi will make them reconcile soon (≧∀≦)
I used to blame Keichi but it's an impulsion because when you read the others books of the story, most of the problems are due to Shingo. But Keichi is at fault too maybe because he can't understand what it's like to be left behind by those who you love like Shingo was. keichi has a family, people who loves him. He's indeed a selfish brat turn in adult. Shingo isn't and protect him from being hurt again by hiding his true feelings. I understand him, I'm the same.

I read again the first chapters and the more I read them, the more my feelings change above Keichi. It's hard to say and I don't want to be misunderstood but I think Shingo is partly at fault in this story. Keichi told him "I love you" and said that he would never cheat on him (chapter 3 or 4 I think). But that pig-headed Shingo treated those confessions very lightly and only focus on the scent thing.
After reading it again, I'm pretty sure that Keichi was very hurt by Shingo's attitude. And don't forget he's jealous of Hasumi so he get it wrong when he came back (maybe for reconciliation) and thought that Shingo start wandering around again to find sex partner ! BUT, as an actor (and maybe as a leopard) he hide his feelings and act as if breaking up with Shingo doesn't bother him. We are shocked by his attitude and so we have the feeling that he is a heartless bastard.
I do feel that, in fact, he's heartbroken too. But has a man, a leopard, a noble, an actor and a superstar, his ego must be very strong and he won't surrender easily...
On the other side, why are we so touched by Shingo ? Because he cries and show his emotions. We saw his tears and how miserable he is without Keichi's love but he doesn't tell anything to Keichi about his sad past and we NEVER saw Keichi crying. It doesn't mean that he is not sad.
And what about that fuck*** Angelo ?! He doesn't act like Keichi's new lover (many many thanks to SuzukiLina) ! He says something like "oh hello kitty, it's nice of you to come, Keichi is over here". WTF ???