The super popular high school guy's got the hots for his brute of a childhood friend! Yoruichi and Benio attend the same high school and despite being completely different types, they've been best friends since kindergarten. Benio's not bad-looking, but he's got an overbearing personality that drives girls away. Yoruichi, on the other hand, has a hot face that's got the entire female student body flocking around him constantly. Yoruichi's always had a thing for the inexperienced Benio, though, and can't help but leap at the chance to teach him how to bang a girl. Meant only as a joke, Yoruichi's shocked when Benio's curiosity takes over and the two start making out and even caressing each other! A happy-go-lucky dude with a V-card and his downer of a sensual friend engage in love-making lessons with different implications for both.
「お前が女の子にしたいこと、俺としよ」

ガサツでモテない紅緒（べにお）と
黙っていても女子が寄ってくる夜一(よるいち)は、
幼稚園からの幼馴染。
どんなに紅緒に羨ましがられても、
昔から夜一の好きな人は紅緒だけだった。

なかなか童貞が捨てられず焦っている紅緒に
つい「女の抱き方を教えてやる」と言ってしまった夜一は、
好きな人とエッチできる幸せと切なさの間で揺れ動くが…

次第に紅緒は女子ではなく
夜一を気持ちよくさせることに
夢中になっていき!?