Reuniting after a long time, Fuka and her teacher are enjoying a warm visit at her home. Now married and living a happy family life, Fuka invites her teacher in and heads out to buy food to treat him. But when she returns, she finds an unexpected crisis—her teacher and husband have been captured by the Shadow Ghost gang. Transforming into her heroine form to rescue them, Fuka fights back but is overpowered and taken prisoner. She can't suppress her moans as soldiers torment her with a vibrator. Then the Shadow Ghost's game begins: each time Fuka makes a sound of pleasure, it pulls the trigger on a Russian roulette bullet aimed at her teacher's forehead. As the cruel torment continues, Fuka struggles desperately to stay silent. Yet with age, her body grows more sensitive, intensifying every sensation. What fate awaits her teacher?