Mirai Sunohara is an investigator for a government agency but an unofficial organization. She infiltrates the enemy's hideout to rescue her comrades, but is taken hostage and restrained. "Sunohara, what are you protecting...?" She is given a pleasure drug and tortured with electricity and a vibrator. She is made to cum over and over again, but she resists bravely. However, she goes beyond her limits, convulses, and has multiple orgasms...