Because it's a pretty vile thought to have? Even for someone who is in his first serious relationship? You mean to tell me we're supposed to be sympathetic instead towards this guy thinking about cheating after he has repeatedly declared how much he loves his boyfriend, has moved in with said boyfriend, has revealed their relationship to said boyfriend's mother, AND has expressed insane jealousy over the boyfriend making friends with their neighbor, because he can't stand the thought of said boyfriend being with anyone else (cough cough oh the irony cough cough)?
Yeah... we've seen the non-linear character growth happen across these 80 chapters already, from both sides, but at some point, there's an expectation that cheating would leave Kaji's brain. I guess we're the fools for thinking like that, huh?
people here really dont understand unhealthy coping mechanisms and how when under stress you can so easily slip into them. people here are acting like he killed a puppy, but i bet they all have unhealthy ways of dealing with things themselves. some of ya'll need to look in a mirror. the author is fleshing out his character, trying to show how, yes he thought it but then he instantly thought of his boyfriend and how wrong that thought was. it was to show his growth and how hes changed and everyones got the torches out and ready to storm the castle. children, nothing but children.
I completely disagree with this opinion because it fundamentally minimizes the emotional trauma of betrayal. Calling people "children" for being outraged is a dismissive excuse that ignores a painful reality. The moment you view cheating as a valid coping mechanism to escape stress, you have already emotionally violated your relationship. Also loyalty is not a last second calculation where you get a price just for remembering your partner exists before crossing the line. It is genuinely sickening to watch someone default to the idea of breaking their partner’s heart and trust they built for each others, and the community has every right to feel repulsed by that lack of core integrity. The true growth means your partner is your safe comfort zone under pressure, not an afterthought you almost discard the moment life gets difficult.

why r we dogpiling on the seme for thinking abt cheating when he’s at his lowest if u can’t handle that, i don’t think u could handle the intrusive thoughts most people think. yes cheating is irredeemably bad, and i don’t condone it- but can we put on our thinking caps here