A nephew is staying with his aunt Minori while he attends university in Tokyo. He can't help but blush as Minori clings to him in casual loungewear that reveals her cleavage. Her voluptuous breasts, which look as if they might fall out of her clothes at any moment, and the sweet, seductive voice that rings in his ear, all shake the nephew's mind. Controlled by his worldly desires, the nephew gives in to his desires and stumbles into a forbidden relationship.