Shoujo Sekai: Boku dake Otona de Motemote Harem

The main character wakes up in a world where there are only boys and girls. He fucks a teacher who has become small for examination and gets raped by a small delinquent girl⁉What will happen to him surrounded by curious girls?

(Source: Mujin Comics, translated)

Note: Published in Comic Mugen Tensei 2022-11, 2023-02, 05, 07, 09