Idk why the MC keeps on agreeing on this "provisional" girlfriend bullcrap. If you really don't want to be with her you can talk it in a serious matter and she'll probably just give up on this whole farce. She knows you like someone else and that's probably a good enough reason to just stay the fuck out of that toxic relationship. You keep on giving her hope that things will work out if she try hard enough and that someday you'll choose her but you know it's not gonna happen. It's like he is keeping her as a rebound and that shit's not cool at all. Not that I'm saying that the MC's the only one that's at fault here and yes I'm looking at you Ruka, just wake tf up, you're fighting a losing battle.