At a certain gym, the new trainer Masami showed interest in a specially made drink by a sports doctor and decided to drink it. However, it turned out to be a drink laced with a potent aphrodisiac! Struggling to suppress her flushed body with reason, her rationality gradually crumbled. She began to crave a penis like an estrous bitch, becoming a captive to the aphrodisiac, greedily devouring the bodies of male members, experiencing continuous orgasms!