Haruna Ikoma, judo national high school champion, former Japanese national team member, and renowned mixed martial artist, is a powerful trainer holding a black belt in karate. To a combat gym led by these female trainers, a group of new male trainees arrive. To build their basic physical strength, the female trainers enforce brutal, relentless training regimens—mercilessly applying techniques, using the men as human punching bags, and ruthlessly beating them during sparring. Furthermore, as part of "senior care," they force the men to perform oral worship from between their toes all the way up to their cunts, and by the time the men realize something is amiss, they're already completely under control. The female trainers delight in tormenting the rookies, stripping them bare, and establishing themselves as sadistic queens ruling over the gym. Gradually, the men become nothing more than obedient slaves at their command. Finally, an ultimate team battle of men versus women takes place, delivering results more shocking than anyone expected.