Katei Kyoushi x Saimin 2

Masato is harassed and abused by the Shinjo sisters, two older women who work as private teachers. Physically and mentally exhausted, he receives help from Sakiko, owner of a mysterious club called Gentil Donna. This woman gives him a mind control device that he will use to get revenge. First he controls Serina and when he finishes sexually abusing her, he manipulates her into arresting his next victim, her sister Haruna.