A daughter raised by a single mother consulted an acquaintance to introduce a man for her mother. The man suggested a hot spring trip. Her mother seemed to like the middle-aged man he brought along, which reassured the daughter. However, while enduring the man's sexual demands for her mother's sake, she began to get excited. When the four of them took a bath together, seeing the daughter's actions made the mother excited as well. Eventually, it turned into an orgy between the mother and daughter with the two men.
