結婚した兄貴の奥さんが我が家に泊まりに来て数日、僕は密かな楽しみを味わっていた。それは義姉の生脱ぎパンツをオカズにオナニーすること…。ここ毎日、脱衣所でパンツを奪ってはオナニーに勤しんでいたが、それも義姉が帰るまでの間だけ…と思っていたのに、何故か派手なパンツがまだ脱衣所にある！？この嗅ぎなれたエロい匂い…もしかして、母さんのパンツだったの！？そして狂ったようにパンツに執着する僕の異変に気付いた母にある日呼び出されて…。

My brother’s wife had been staying at our house for a few days, and I’d been indulging in a secret pleasure. It was masturbating while using my sister-in-law’s freshly removed panties as a visual aid… Every day, I’d sneak into the laundry room to grab her panties and jerk off, but I thought that would only last until she went home… Yet for some reason, a pair of flashy panties was still in the laundry room!? That familiar, erotic scent… Could it have been Mom’s panties!? Then, one day, Mom—who had noticed something was wrong with me as I obsessively clung to those panties—called me in…