
Ok now since i read ch 5, it's much better. I like how arata talked to the senpai. But when he said "I'm not a good guy and i did it because it felt good" i wonder if he was telling the truth or said it simply to make arata feel better. I'd like to see the senpais point of view in a spin off

nah he was a good guy, he stopped doing it as soon as he found out natsuki had a bf and afterwads he felt really bad about the whole situation judging by his expression here http://www.mangago.zone/read-manga/nigai_no_theme/uu/nigai_no_theme-chapter-4/18/

I usually love this author's works, but this one was meh for me. And not even because of the cheating....i guess it was the way that it was handled? After he beat him up, arata went right back to the way he was. We don't see the lingering mistrust left by the affair and natsuki is still holding on to his guilt (understandably). I didnt see them go thru any major changes in character so that leads me to believe that history will repeat itself with this couple, sadly.
As much as i hate to admit it... Jiwon has said from the very beginning that this was strictly a physical relationship and honestly it sounds like he's trying to remind dg of that so he doesn't get hurt. Of course We all know he will fall for him sooner or later but i didn't see anything wrong with what he said.
On another note, i can't wait to see chanwoo chapters, he's the best