Hi I am looking for a echhi harem manga, I read few years ago. The manga had some sort of fantasy/magic school setting where the protagonist is the teacher of a class, is somewhat perverted, he is strong. In the initial few chapters there is a new fresher girl who is angry at the protagonist for harassing/fucking a senior/her sister student and challenges the protagonist for a fight, they fight in a colosseum like arena, the teacher protagonist seemed to have some sort of dark/shadow magic.

Also there was some talk that if the girls lost her bet/or her grades didnt improve etc, the protagonist will fuck the girl each semester or year, first safe/protected sex → then raw sex → then raw sex on her period/creampie etc, with the manga image drawing showing three asses/vagi showing what will happen each year etc. The art was nice the girls looked mature and busty the protag was likely on the slimmer/young side cant remember properly.

They both were likely wearing greyish/blackish uniforms. I likely read it around 2016-2020, can somebody please help me find what this manga was.

Please suggest any similar manga that had any scenes like this as well.

I tried finding it via tags on mangaupdates but couldnt find it.

I would be forever grateful to you. Thank You

Is it Ouritsu Majutsu Gakuin no Kichiku Koushi?

Yes this is it thank you very much. May you get isekaied to the world of your dreams XD

It seems it hasnt gotten any new translated chapters since then ... what a shame ... it seems fun.

Thank you again for this.