Mizuki and her husband lived a comfortable life. However, by chance, she met a younger man named Kenji and started a relationship with him. Although Mizuki was satisfied with her current life, she wanted excitement from Kenji, who openly expressed his affection for her. However, one day, Kenji broke his promise and came to her house, and Mizuki kicked him out. After that, Mizuki cut off all contact with Kenji, but when she received an email saying "I want to see you," she left a fake note and headed to Kenji's place...