Marta is a young female warrior of the Minotaur bullfighting tribe who is active in the arena. Yuuma, the coach who raised this innocent girl, is threatened by the owner of the arena to make her lose as a punishment for the loser, "public sex." Yuma is cornered into a situation she cannot escape as the nobles demand to see her lewd acts, despite her still being undefeated. Realizing this, Marta secretly vows to lose in order to repay him for her kindness. Appearing on the field of the match is Four Hands, a gigantic monster with four arms and a throbbing penis. As soon as the match begins, the petite Marta is lifted up and restrained!?