I read the raws a while ago, it's just a silly bait by the author. Don't worry guys there isn't any NTR or wtv. Not really sure why theres a break up though, like it's the most pointless event I've read in a while. It's literally fixed in 2 fucking chapters.
Im gonna need some info then, because there is no way you can fix this without the plot going beyond levels of dumb.
Like ok, the whole "I hired your ex-boyfriend groomer as your teacher" is kinda dumb, but at least you could argue thats Koga putting his trust in Meguro and takes her future above his personal feelings, but i have no clue how the hell you can fix it after you do all this and then don't interact with each other whatsoever and then your girlfriend just comes after a while and tells you"We should break up, its not you, its me"
Like tell me who the hell would go back into the relationship after this? Any man alive would immediately connect the dots and cut any sort of communication with her and yes, she can say "I didn't cheat on you" but who would trust that? Even if it was the case how the hell would anyone trust you at that point? Say you go back into the relationship and then what? You will get job opportunities and repeat the same dance in hopes there will be the same result?
This whole chapter just has no fracking way to back out of this if Koga doesn't stop it literally the next chapter(And even then its pointless drama for the sake of the drama)