Mizuki who lived without any inconvenience with her husband. She has a relationship with Kenji, who is younger than her, by chance. Mizuki seeks stimulation from Kenji, who is satisfied with his current life but frankly shows affection. However, one day, Mizuki kicked out Kenji, who broke his promise and came to his house. After that, Mizuki cut off contact with Kenji, but when he received an email saying "I want to see you", he left a fake memo and headed to Kenji's place...