Private tutor Miki was living a dull and unfulfilled life. Her husband's lack of sexual interest left her struggling to suppress her overflowing G-cup breasts every day. She knows it's wrong. Yet, she can't help but rest her large, soft breasts on her student's shoulders, feeling her heart tremble with desire. To the student, her actions appear undeniably lewd. Alone together in the room, writhing with tension, Miki's sensual lessons finally begin. In that moment, their relationship takes a sudden, intimate turn.