Recently, my little sister has been growing up into quite an adult figure. While casually checking out her accidental panty shots or sweet cleavage peeks, I couldn't help but get hard! To my surprise, she then asked if I was getting turned on by her, and before I knew it, I found myself blurting out that I was actually excited by her too! It's true that I'm still a virgin, but it seems like my sister really got turned on by seeing my erection... We eventually realized we had crossed a line that shouldn't be crossed, especially since both of us are under the impression that this would just be a one-time incestuous encounter between siblings.

最近、大人っぽい体に成長した妹。何気ないパンチラやガードの甘い胸元を見ていたら思わず勃起！すると『お兄ちゃん、もしかして私で興奮したの？』と言われ、思わず『オマエだってオレで興奮してるじゃん！』と言い返す事態に！確かに童貞のオレが勃起したのは事実。でも妹は妹でオレの勃起に興奮してたみたいで…。醜い言い争いは結局越えてはいけない一線を超え…2人ともあくまで1日限りの近親相姦だと思っています。