Finished

Kyonyuu Hitozuma Onna Kyoushi Saimin

Hentai

Story

Based on the erotic game by Lune. Morishita Wataru grew up on a motherless family, but despite his lonely environment, he worked hard and managed to enroll in the prestigious Ousei Academy. The school is run by an old scholarship rule, in which the students' grades are tied to the teacher's evaluation, so the teachers inevitably gives the students a strict education. Morishita has good grades, but in a class where everyone is an excellent student, his grades were below-average.

Synopsis via AniList (English).