A secret has been going on for years that nobody knows about. To help her father, who is approaching retirement age, regain his sexual function...the daughter named Ruu is forced by her mother to receive daily testicle massages every day. At first, she was confused but eventually agreed when she thought, "If this can give me brothers or sisters..."

数年前から続いている誰も知らない秘密があります。還暦間近の父親の男性機能をアップさせるため…母親には内緒で毎日睾丸マッサージをさせられている娘のるぅ。初めは困惑していた彼女だったが、兄弟が欲しかったるぅは「もしこれで自分に弟や妹ができるなら...」自ら言い聞かせる事でそれを受け入れていった。