Honor Student Sisters ~Corrupted by A Delinquent Gang~

The main heroine of the hentai, Aoi Masaki, is a model student and the student council president. In contrast to her is her younger sister Kaede Masaki, who is the leader of hardened delinquents. Together with her gang, the younger sister decides to teach Aoi a lesson. They lure her into a trap and record a lewd video with her for subsequent blackmail. Subsequently, Aoi turns into a real depraved slut. Kaede realizes she has done something terrible and tries to save her sister from the clutches of the aroused crowd, but then becomes a participant in a massive sex orgy...