Right after getting married, my husband will be arranged to work alone for three months. He lives with his sister and his wife, who are worried about living alone, and spends peaceful days. One day, I learned that my brother-in-law, Tetsuya, is going through a painful time without sex... Moreover, he has a magnificent rare decacchi gate, he cannot suppress the aching physical desire that secretly seduces him. And Tetsuya, who has a relationship with the temptation of her little devil one day...