Hitomi, whose father-in-law passed away and inherited her family's public bathhouse with her husband. They have less and less time together as a couple due to their busy lives, and she spends her days feeling lonely. At such a time, a regular customer named Manabu happens to start working part-time just before closing time... While working up a sweat, Hitomi, who secretly became interested in him, ends up having a relationship with him after a certain incident. The pleasure of touching a dick after a long time awakens the desire sleeping deep within the married woman, and she orgasms many times in the large bathhouse where moans echo...