Uni Shiokawa marries into a family with two stepbrothers. From the wedding greeting, she tries to act like a mother to her stepbrothers, but it doesn't go well. When she consults her husband, he says time will solve the problem. One morning, while her husband is away for work, one of the stepbrothers starts demanding, "If you're my mother, let me suck your tits, or I won't acknowledge you as my mother."
