Rena Fukii plays Reiko, a woman in her early thirties working as a high school teacher in Tokyo. Though she married young, she has been unable to have children and feels growing dissatisfaction and monotony in her sex life with her husband. Unknown to anyone, she harbors a secret desire: a deep admiration and longing for older women. To satisfy these hidden urges, she uses her charm and cunning words to lure her teenage male students into secret physical affairs, seeking emotional release and fulfillment through passionate encounters with younger men. This double life, filled with illicit desire and forbidden pleasure, is a burden she carries alone.