Masami, a rookie trainer working at a certain gym, takes an interest in a special drink made by a sports doctor and decides to drink it. However, it turns out to be a drink containing an aphrodisiac with strong erotic effects!! Although she tries to suppress her flushing body with reason, her self-control gradually collapses. Like a bitch in heat, she craves cock, becomes a slave to the aphrodisiac, and devours the bodies of the male members, reaching continuous climaxes!