A naive girl mistakenly confuses a Japanese Adult idol with a Japanese pop idol, sparking a racy and raucous series of events for both beauties. Ryoko is in Seoul to film a movie when wannabe Yuna mistakes her for a great Japanese idol and follows her to set. There, the director casts her in his erotic movie, and Yuna accepts without knowing what the film is. Ryoko moves heaven and earth not to hurt Yuna’s dream, but the moment to shoot the steamy love scene is fast approaching…