Daisuke, one of her husband's students who is a teacher, is coming to stay for a few days. Reina, the wife, unconsciously gazes at the young man's strong body with excitement... Her body, which has not had sex with her husband for years, is aching with desire. Her sexual desire grows stronger and stronger, and she is unable to suppress it and tries to satiate herself, but Daisuke sees her indecent behavior... Reina is embarrassed and asks, "Is it okay for an old woman like me...?", but she enjoys the pleasure of being approached by the sexually-strong young man, and drowns in the pleasure that gushes out like a spring...