Sumire who was dating her bastard ex-boyfriend Tsuyoshi. Tsuyoshi was a typical thug who immediately made money, cheated, and did not use contraception. Sumire, who was finally able to escape from Tsuyoshi after dating for many years, was now living with her proper and kind boyfriend Takao on the premise of marriage. However, Tsuyoshi, who witnessed Sumire being with Takao, asked Sumire to Taka again.