I love thing manga and I don't thing the reason for you to hate it and also I don't thing he is cheating. The other one know about it and still chose to be with him so it okay. They both know it so it is okay And this is my opinion and don't complain about my opinion please thinks .
I agree, I didn't think he was cheating either. They agreed to break up and I think Osamu went along with it so the uke would finally realise that Osamu is the only one he needs. And we got to see that.
I love thing manga and I don't thing the reason for you to hate it and also I don't thing he is cheating. The other one know about it and still chose to be with him so it okay. They both know it so it is okay
And this is my opinion and don't complain about my opinion please thinks .