Looking

Manga/Japanese Yaoi.
Omegaverse
Short story

MC is a teacher (light hair) I think, and ML (dark hair) is a senior in high school(?). MC is bottom, ML is a top and is rude and cold to the MC at first but warms up and is kinda shy too (or just flustered easily by MC).

I remember the rape scene that happened in CH 4 by a dude that used to be a teacher of ML’s. And he got revenge on ML for not being a good student or whatever and got himself fired, so he raped MC.

He did it all the way and ML could only save him at last moment. Barf.

And I also remember the MC crying because he was afraid to stand up for himself, ML called him a coward out of anger or disappointment and left through the window. But MC came to school the next day and defended someone else I think and himself, proudly. ML was surprised and then proud.