Megumi, a 22-year-old nurse, has a father complex: she dotes on older men. Her affair with Tanabe, a man in his late forties, is fueled by mutually embarrassing sexual secrets, not the least of which is Megumi's deep-rooted incest fetish. But when Tanabe's real 21-year-old daughter enters the picture, the situation threatens to soar to levels of perversion undreamt of even in Megumi's wildest fantasies.