I think it's mostly guilt. He feels guilty because he thinks he the reason why the guy is like that. Beaniebby
yh kimoto always harbored feelings for tehir, and still do now, ever since tehir was hurt pretty badly, kimoto took it upon himself to take care of tehir, basically making it his responsibility most of his life
Kimoto needs to lock tf in like why r u getting trashed around by a manchild bcs of a childhood crush. Loser behavior.