A close-knit brother and sister. The sister asks her brother to help her lose her virginity while they relax in the living room. As he watches his sister's huge G-cup breasts and pure white panty shots, he can't help but get fully erect. His overactive imagination leads him to ride her like crazy! After discussing their lack of sexual satisfaction, the brother offers advice and ends up slipping inside without warning! They've been dating for two months, but the girl isn't sure if her partner is satisfied during sex. She asks about frequency and flow, and her brother decides to show her by starting with missionary position. However, he can't resist any longer and cums inside her despite the condition not to do so. Inspired by AV, he even gives her a facial! Note that recording contents may vary depending on the distribution method.

仲の良い兄妹。妹の初めてをお助けするべく一肌脱いだお兄ちゃんが素股プレイで暴走っ！！■居間でくつろぐ兄妹。妹の爆乳Gカップのおっぱいや純白パンチラを見ていたらついついフル勃起。シスコン兄の暴走劇っ！！騎乗位素股で気持ちよくなって割れ目にイン！！！■彼とのHが上手くいってない妹が兄に相談。すると兄はいつもの雰囲気を再現しようといい、色々レクチャーしているうちにヌルンと挿入！！■彼と付き合って2カ月SEXはしているが相手が満足しているか分からないという妹。どの位の頻度で、どんな流れでSEXしているのかとか色々聞いている兄。実際やってみようと素又騎乗位開始！！しかし我慢できなくなった兄が理由をつけてパンツを脱がし、中に出さないという条件で生イン！！AVに感化された兄が顔射っ！！※ 配信方法によって収録内容が異なる場合があります。