Hara Poko! ~Inou Saimin de Jogakuen o Haramase Seifuku~

Conquer the girls' school by impregnating them with hypnosis! "Hahaha! I will conquer this girls' school!" Ryuuma Uobishi, a teacher at an all-girls school, heard a rumor that claimed that if you performed a certain ritual in the school clock tower at midnight, a god would appear and grant your wish. Although he thought it was ridiculous, Ryuuma performed the ritual out of curiosity...and it worked. With his new "supernatural ability", Ryuuma begins to carry out his secret desire of "conquering the school by impregnating his female students!'' [Edited from DLsite]