Teacher Haruka has arrived at school, boasting a stunningly voluptuous figure that makes her big, jiggly breasts sway with every step, sending the male students into a flustered frenzy. As the homeroom teacher of three mischievous boys, she constantly finds herself caught up in escalating trouble whenever they pull pranks, leading to increasingly erotic situations. During gym class, she teases them in her tracksuit, while in the nurse's office, she delivers soothing blowjob scenes. In art class, she even reveals herself as a nude model, and her health and physical education lessons are packed with excitement, leaving the students utterly thrilled.