
Wow the ex-bf really let go the uke. That is why he deserved some love too

No, I don't think that was it. He was hurting as well, every time he hit Yumi. It's really sad actually.
You can try reading his spin off, if you'd like, so you'll understand this character better.
Sure, his actions were horrible and unjustifiable but he does deserve a second chance. His story is really beautiful.
I like how it is different from other handsome seme cliche stuff, the author didn't tried to prtray the seme as a playboy, the seme has character development in later parts. UwU I just like their romantic combination