Ero Zemi: Ecchi ni Yaru-ki ni ABC - THE ANIMATION

Based on the erotic game by Atelier Kaguya Bare & Bunny.

Kusukuni Kyouji has attained an almost legendary status as a freelance prep school teacher, owing to his helping many problem-, and weak-students all pass their college entrance exams (for institutions with a high entrance-examination difficulty).
And such a legend was called u...