“Dad loves someone. Someone who isn't you, mom.” After hearing her daughter's shocking words, a battle with her husband begin! Kasumi married Yosuke, whom she admired since her school days. However, she finds it difficult to get along with Masaya and Emi, who are Yosuke's friends. Ever since Masaya moved to Tokyo on a job away from home, Emi, who has come to visit frequently, seems to be closer to Yosuke...? When Kasumi finally decides to divorce Yosuke, he takes an overbearing attitude toward their daughter...!