ROYD-349 — A forbidden weight-loss drug awakens her into an incredibly slim beauty! Forbidden incest between siblings as she completely releases years of pent-up sexual desire on her brother.

A 100kg shut-in sister injects herself with a 'forbidden weight-loss drug'! The next day, she appears before her family... super slim and beautiful!? Her brother, who had always mocked her, is shocked and excited! Now confident, the sister releases her pent-up sexual desires on her brother's dick! The brother and sister have sex over and over again, as if their previous relationship was a lie...