Hitomi, a lonely housewife trapped in a passionless, arranged marriage. Her life is upended when her husband’s nephew, Masaru, comes to stay with them. What begins as an innocent massage quickly escalates into a intense, physical affair. Hitomi, who has never experienced sexual pleasure with her husband, is completely seduced by Masaru’s youth and passion, and she willingly becomes his lover. The affair continues even after she becomes pregnant with Masaru’s child, which her husband believes is his own, and she ultimately chooses to continue her life as Masaru’s “sexual toy,” fully embracing the affair.