In her first year of marriage, Airi was still having daily sex with her husband and living happily in love. However, suddenly her husband got assigned a one-month long business trip. To ease his loneliness during the trip, he decided to have his sister stay with Airi. Little did they know that Airi's sister Sumire had been secretly eyeing Airi since she started dating her brother and was hoping to draw her into the world of lesbians. Note that the contents may vary depending on the recording method used.

結婚して1年目のありさは今でも夫と毎日セックスしてラブラブだった。しかし突然夫に1ヵ月の長期出張が決まる。夫は寂しいだろうと自分の姉を出張の間、ありさと同居させる。しかし実は姉のすみれはバイセクシャルで、弟がありさと付き合いだした頃から彼女に目を付け、レズの世界に引き込むタイミングを窺っていたのだ。※ 配信方法によって収録内容が異なる場合があります。 特集 最新作やセール商品など、お得な情報満載の『SOD GROUPストア』はこちら！