親の再婚で出来た1つ下の妹‘ゆら’は最近イタズラにパンチラ誘惑でボクの反応を楽しんでした。そんなある日、両親が行けてなかった新婚旅行で家を不在にした4日間、ゆらのあざと可愛い誘惑がエスカレート！「ゆらのおっぱい見たかったんでしょう！」2人きりの空間…血が繋がっていない可愛すぎる妹…もう理性を保つことが出来ず禁断のセックス！限られた時間の中で両親が帰ってくるギリギリまでセックスに没頭しました――。
My younger sister Yura, who was born from my parents’ remarriage, has been teasing me by flashing her panties and enjoying my reaction. One day, while my parents were away on their honeymoon for four days, Yura’s cute and cunning temptations escalated! “You wanted to see Yura’s boobs, didn’t you?” In a space where we were alone… my unrelated sister is too cute… I couldn’t keep my sanity anymore and we had forbidden sex! With the limited time we had, we immersed ourselves in sex until the last minute before my parents returned home.

– JavGG.net