In this steamy tale, two sisters, Yui and Hari, continue their lifelong obsession with 2D entertainment well into adulthood. Despite having zero boyfriends between them, they find themselves constantly teasing and tempting each other while their virgin brother looks on helplessly. Little do they know that despite being a virgin himself, he possesses incredible stamina and can repeatedly release his potent seed! It should be noted that the recorded content may vary depending on the distribution method used.

大人になっても2次元しか興味ない、彼女歴ゼロ、さらに童貞の兄を持つ姉のゆいと妹のはるのメスガキ姉妹が兄を悪戯しながら誘惑！兄を性的に持て遊ぶメスガキ姉妹だが…実は兄は童貞なのに何回も発射出来る絶倫おちんぽだった！※ 配信方法によって収録内容が異なる場合があります。