Beautiful Shinobu is a kind and warm wife who dedicates herself to her family, but behind closed doors, she's a wildly lustful woman craving other men's cocks more than her husband's. Her perpetually aroused, relaxed body remains unsatisfied by her husband alone. At forty years old, driven by insatiable desire, Shinobu finds herself entangled in new encounters once again. What kind of event awaits her this time?