Famous actress Ishihara Rina challenges 'first machine vibrator,' 'first triangular horse,' and 'first black sex'! The appearance of a new female teacher excites the male students. A plan for violation is devised, and Rina is trained with electric massagers or machines. She squirts multiple times, and her reason collapses under the influence of aphrodisiac herbs. She mounts men on her own and inserts multiple erect penises, receiving the entire class's semen inside her, causing turbid fluid to overflow from her vagina!
