After being laid off from my job, I was taken care of by my older brother at his house for a while. When I arrived, there was no sign of him but 'Reika', my beautiful sister-in-law, greeted me warmly. She has always been kind and cheerful, and she's got an incredible pair of breasts that my brother never had. Ever since we first met, I've secretly admired her. As it turns out, my brother went on a business trip, which means Reika and I are left alone together in this house... My heart started racing at the thought of it. To my surprise, Reika seemed to know how I felt because she suddenly joined me in the bath or appeared in revealing attire, leaving my mind filled with thoughts about her huge breasts instead of preparing for job interviews.

会社にリストラされた僕はしばらく兄貴の家にお世話になることになった。家にいくと兄の姿はなく‘怜香’お義姉さんが一人で迎えてくれた。いつも明るくて優しい‘怜香’さんは兄にはもったいないくらいの巨乳美人。初めて会った時から密かに憧れている。話を聞くとどうも兄は出張らしくつまりこの家に僕と巨乳のお義姉さんと二人きり…。そう考えるとドキドキしてきた。そんな僕の気持ちを知っているのか怜香さんはいきなりお風呂に入ってきたり、露出度高めな姿で現れたりして、僕の頭は兄嫁の巨乳のことで頭がいっぱいで就活どころではなくなってしまった。