体重100kgの引きこもり姉が’禁断の痩せ薬’を注入！翌日、家族の前に現れたのは…超スリムで美人になった姉だった！？今までバカにしてきた弟は驚きと興奮がおさまらない！自信を手に入れた姉はため込んでいた性欲を弟チ○ポで発散！今までの関係が嘘みたいに姉弟は何度もヤリまくるが…

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…