Kateikyoushi x Saimin 2 The Animation

Story

Based on the erotic game by POISON. The tutors of the main character, Masato, are "the sexually vicious sisters" he had known since childhood! Haruna Shinjo, the celebrity older sister, combines brains, a fine pair of eyebrows, and the worst kind of personality. Serina Shinjo, a college student with a selfish personality and body, is full of gaps. He is constantly mistreated by both of them, and is already fed up with his life. Then one day, Masato meets Sakiko Ichinose, the owner of the secret club "Gentildonna" and is handed a hypnosis device.

Synopsis via AniList (English).