After her father-in-law's sudden death, Hitomi Honda and her husband took over the family bathhouse. Overwhelmed by daily responsibilities, they grew distant, leaving her feeling lonely despite maintaining a forced smile. One day, a regular customer named Manabu appeared at the bathhouse just before closing. When they learned he was looking for part-time work, they decided to hire him. Watching Manabu work up a sweat gradually drew the wife's attention, sparking feelings she hadn't felt in years. One day, he secretly approached her, and they began a physical relationship. For the first time in a long while, being touched by a man's cock awakened her deep, slumbering desires. In the large communal bath, she reached climax after climax. Surrounded by warm water, their forbidden bond continued to deepen.