Yuuya who went to graduate school. I live in the house of my stepmother’s brother in Tokyo.The divorced new brother is the first daughter to work for his company, Asuka, I lived with Sayaka, a college student. A few days after Yuuya comes home, she leaves the house with her business trip. The next evening, Yuuya takes care of Asuka who is drunk. She is disrespecting that there are too many staff to spoil her, the daughter of the president. Asuka, who loves a kind person like Yuuya, and attacks him. Sayaka, who has come to ask questions that she does not know as usual, sees two sexes. The next day, Sayaka and Yuuya, who have a day off. The temptation of Sayaka, the house where only her sister goes to work, remains.