It seems Waka's boyfriend of four years is cheating on her... Junko, Waka's junior who adores her, can't stand it and confronts Waka's boyfriend, but he cleverly evades her questions. Determined to gather evidence, Junko stakes out the place and witnesses Waka's boyfriend and his mistress entering a love hotel! She tries to peek in from the next room, but the electric massager and vibrator in the room catch her attention... And then what happens...