Doushite Sensei Ni Natta No.
Well, it's not exactly rape-rape, hugely manipulative shit, but still left me disgusted.
Honestly I thought it would be fine and Nakamura just comedically overthinking things about the teacher, but with the latest chapters and teacher going all "oh you would be so cute as a girl" or riding on a car with him, it seems jarring as fuck, especially knowing author's preferences
Besides, MCs have no development whatsoever in part 2. I hate it, it was just a cute manga about an autist with a crush, now it's getting weird af. Also we were never shown Nakamura's bad haircut, dammit