Since her father-in-law was old, Nao and her husband inherited the public bath that he left behind. Because her husband was used to office work, managing the bath while also working was too much for him. Nao decided to help her husband manage the bath. However, this also meant that the two rarely met. After work, her husband had to take care of his father, which left Nao feeling very sexually frustrated but unable to do anything about it. One day, Takahashi, a young but very hardworking boy, continuously worked overtime and had to stay late; he often came to Nao's bath, and even though it was closing time, Nao still let him in. One time, Takahashi fell asleep in the bathtub due to being too sleepy, and Nao quickly rushed in to rescue him. She suggested that he quit his current job to work for her. Takahashi agreed, and from then on, Nao and he spent a lot of time together, and they began to develop feelings for each other. Although she knew it was wrong, Nao's body was too for sex, when Takahashi took the initiative first, her mouth couldn't speak, but her body wanted to enjoy more...