The seme's actions in the first chapter are harsh however it's clear that he has been in love with the uke for a long time which makes his change to a good decent guy make sense because he was able to realise how he was hurting the person he loved. Does not mean I can accept what he did to the uke
Edit: dude stop it, I'm sick of making excuses for you leave him be there are other options other than to take his body to express your love!
Zenbu, Ω na Ore no Sei.