That doesn't count as cheating cuz they weren't lovers yet.
oh, i forgot, i just read ch. 5-6 so, i thought you're talkin bout last couple, sorry. Last couple are good.
I totally agree with anon on this, cheating is such a no no.
If his reason was the same as in the manga, then it would be good to go and find someone you wouldn't ignore during your relationship. It means you didn't love or want him enough anyways.
It's not just about the sex, the seme was spending all of his emotional time with others too. The uke was trying to tell the seme he was feeling neglected, and the cheating was the result of the seme not listening to his partner properly.
Sorry, don't like cheating. If my boyfriend cheated on me just to prove a point, no matter how much he loved me, I wouldn't be able to forgive him. We would break up and both be miserable for a while, then I'd get over it and find someone who wouldn't cheat. That's what my boyfriend would get for cheating.