Yuri manga that's full of messed up char

I made the mistake of reading this on another platform. It didn't tell me it was a tragedy and also tagged it as shoujo ai which was wrong. Beware of this comic. Don't read if you're expecting Yuri. According to the spoilers I've read, the villainess fell in love with MC but MC ends up with a dude instead. This is queerbaiting so steer away. Godss I'm so pissed for wasting time on this. They gave Rebecca a tragic end. The sad thing is they were perfect for each other and they ruined it.