"Since the kid is small, I might cause you some trouble, but please take care of me." The beautiful woman YU who moved in next to Kentaro is a single mother who recently got divorced. "I've been looking all over for you, hiding out in a place like this!" A few days later, when Kentaro returned home, he found Yu arguing with a man. Judging from the content, the man was her ex-husband and seemed about to strike her. "What are you doing? I'm calling the police!" Kentaro quickly intervened and saved Yu, causing their relationship to rapidly grow closer…
