Rino is 26 years old. After graduating from junior college, she got a job at a major cosmetics company and married a man she met through a friend who works for a top foreign company after dating him for four years. She has one daughter and is now a full-time housewife. Her husband is doing well in his career and she has no complaints about her family life, but that is why she is seeking dangerous "excitement" outside. She goes on a two-day, one-night trip to a hot spring with a man she met on a dating site...