Following the first installment "Human Furniture" and the second "Human Vending Machine," a new evolution emerges here. The setting is a rundown fighting gym located in the backstreets of nowhere. A company president, previously obsessed with new product development at his factory, suddenly fixates on a newly-born M-type genetic lifeform. Seeing its potential, he devises a new product line specialized for martial arts training. The idea strikes him as utterly brilliant. A punching bag that undulates with lifelike motion, kicking pads that suddenly cry out in pain, and a sandbag whose responsiveness shocks users with its realism. These creations deliver movement and reactions indistinguishable from actual humans. A bold new genre of erotic entertainment unfolds here.