@jak I mean, I think it has to be. A lot of the struggles of the FMC come from her relationship with that guy and it would be an apropiate way to face her flaws and grow as a character. But if the author decides to throw a curveball and do something else I welcome it as well.
@Romanaire
I feel like her talking about how she and sensei broke up on the school trip with her friends and explaining her feelings on it was the end of that subplot
@JL96 he's the dude with two girlfriends from chapter 12. Since manager dude said two girls quit at the same time I'm betting he now has zero girlfriends. That may be a problem but he didn't seem that bad before.
She'll stay faithfull to Koga , she's moved on from trying to please everyone. The guy will probably be a bit annoying but he's got no chance. Have a bit of faith in Meguro boys...