Chisato, who lives an ordinary life with her younger husband, has recently fallen into a rut. Her nights are dull, and she's been feeling sexually frustrated. One day, everything changes when Hiroshi, her husband's best friend, comes to visit. Hiroshi lusts after Chisato and ends up raping her. Despite being raped, Chisato, who had been sexually frustrated, finds herself drawn into a world of passion with Hiroshi.
