兄貴と喧嘩してきたと言いながら、突然うちにやってきた兄嫁・麻妃さん。昔から奔放で大胆な露出の服が好きなのは今も変わらず、目のやり場に困ってしまう。それは風呂に入ってる時だった。いきなり僕の入浴中に乱入してきてそのまま混浴に！たまらず勃起した僕のチ●ポを見るや、「お口で洗ってあげる」と咥えてくれて…。こうして兄貴とレスで溜まりまくってる兄嫁と僕の眠れぬ一夜が幕を開けた。

My sister-in-law, Maki, suddenly showed up at my house, saying she'd just had a fight with my brother. She's always been free-spirited and loves revealing clothes, and that hasn't changed, making it hard to know where to look. It happened while I was taking a bath. She suddenly barged in while I was bathing and we ended up bathing together! As soon as she saw my penis, which had become uncontrollably erect, she said, "I'll wash it with my mouth," and took it in her mouth… And so began a sleepless night for me and my sister-in-law, who was incredibly horny due to her lack of sex with my brother.