Because his mother-in-law was old, Mr. Nao and his wife inherited the public bathroom. Because my husband is used to working in an office, taking care of the bathroom while at work is very difficult. Nao decided to help her husband fix the bathroom. But that's why the two rarely see each other. After her husband goes to work, he has to take care of his father, which is why Nao wants to have sex but can't. One day, Takahashi, a boy but a very hard worker, continued to work overtime and had to come home late, often staying in Nao's bathroom and even though he was locked up, Nao continued to let Takahashi go. . After Takahashi fell asleep in the bathtub because he was too sleepy, Nao quickly ran in to save him, advised him to stop working and came here to deal with him. Takahashi agreed and from then on, Nao and he were often together, and the two began to develop feelings.