"A woman who resists is turned into a slut by the aphrodisiac vibrator left behind, and she repeatedly orgasms, shaking her hips on a real dick!" Ai, who is kind and pure to everyone, is about to get married to her boyfriend with whom she lives together. One day, she is attacked by a subordinate who has a grudge against her boyfriend, and is forced to insert a vibrator containing an aphrodisiac and is left tied up and left alone. Unable to move or escape, she is too embarrassed to call for help and endures, but gradually her body begins to be violated by the pleasure of the aphrodisiac and the vibrator, and she loses her reason...