A couple who are childhood friends, Rei and Philosophy. It's been five years since her marriage, and she has been showing the same friendly relationship as ever...but this summer, her cheating philosophy is discovered. Trying to get a baby with her didn't go well either, and Rei fell into the depths of despair. At that time, Dango, her philosophical father, comes to stay at her house while on a business trip to Tokyo. She reunites with Dango, who has been nice to her since she lived in her hometown, and Rei becomes attracted to him. When Rei realizes that she has been subtly seducing Dango, she makes up her mind and heads to Dango's house...
