Yuuri lives happily with her husband, Koki, who has no children and tends to open a house on business trips. One day, Akiko of the Miyashitake family, who is next door, asks me, "I'm going on a trip to Europe with my husband and wife." Yuuri was jealous of the graceful Mr. and Mrs. Miyashita, but he proposed to take care of Takashi, the only son of the Miyashitake family, at home. And on that day, Takashi visits Yuuri's house. Yuri was excited by herself because she was told that Takashi was a "virgin" ...
