Chisato is a woman who has been married twice and divorced both times. Both times her ex-husbands had children with them, and even now that she has separated from her ex-husbands, she continues to have contact with their two step-sons. However... it is not what people would call contact, but a sticky, physical interaction between a man and a woman. Yes, Chisato has actually had sex with each of her ex-husbands' sons. And now, she is on the hunt for a husband for her third marriage. After all, it's easy to find a partner...