Previously, Kanna's husband was her superior; he used to have a wife, but she passed away a long time ago. Balancing his job as a manager while raising his son Yuzuru made Kanna want to be there to help him. Soon after, the two started dating and moved towards marriage. The time they got married was also when Yuzuru left their hometown to study in the city. Since it had been a long time since their son had come home, Kanna's husband called to ask him to return for the summer vacation. Unfortunately, Kanna's husband had to go on a business trip at that time, leaving only the two of them at home. Kanna took this opportunity to become closer to Yuzuru, but he still did not see her as a mother. Her large breasts glistened with sweat, constantly appearing before Yuzuru's eyes; she even went to scrub his back, making it increasingly unbearable for him. That night, he invaded Kanna's body while she was sleeping. Because it had been a long time since she had sex, and additionally, Kanna wanted to become closer to Yuzuru, she only weakly resisted, ultimately accepting this improper relationship...