Superheroines known as Accel Girl Angel and her younger sister Accel Girl Venus, psychics from the planet Accel, face off against a criminal organization led by a ruthless mastermind with an IQ of 300. The boss cunningly traps the inexperienced younger sister, captures her alive, and attempts to prevent her from revealing the existence of the planet Accel, while planning to use the mineral Cryptonite—their weakness—as a weapon. However, the boss's true objective goes beyond mere revenge against the Accel Girls; he aims to completely dominate their minds and voluptuous bodies through sexual assault, breaking their spirits through humiliation and training. As a result, the story takes a tragic turn.