today, i'm going to senyu with your sisterinlaw, mori nanako.

The valiant life of a man lives alone in an apartment without a bath. Only his older brother's wife, Nanako, who sometimes came to see him every day was healed. One day, he was invited by Nanako to a public bath. By chance, the distance between the two of them was shortened by entering a woman's bath. After that, Nanako who was not working well with her brother started to invite Yusuke to Senyu, but when they were entering the women's hot spring again, they were found in the watchstand.