A couple of childhood friends, Rei and philosophy. It's been 5 years since I got married, and I've been showing the same friendship ... This summer, a philosophical affair is discovered. Child-making did not go well, and Rei fell into the depths of despair. At that time, Dango, the father of philosophy, stayed at his house on a business trip to Tokyo. - Reunited with Dango, who has been good to her since she was in her hometown, Rei becomes fascinated. - Rei, who noticed that she had seduced Dango without hesitation, made up her mind and headed to Dango's house.