Peak ahh game, Yua the best girl frfr so I don't like that vanny path is unavoidable in last few chapters lol, even when I only have 3 levels with vanny, she still end up falling in love with mc
This is actually a bug. For now, no matter what your choice is, you will alway end up being Vanny's lover. I will release a patch soon, it will fix this and some other issues