A daughter who was raised by a single woman asked an acquaintance to introduce a man for her mother, and the man suggested a hot spring trip. She is relieved that her mother seems to like the middle-aged man brought by him, but she gradually begins to get excited while enduring the man's sexual demands for her mother's sake. When she took a bath with the four of them, her mother was thrilled by what her daughter was doing. She ends up in an orgy of two men with her mother and daughter.
