Rimu's boyfriend, Ichiro, was troubled by always being half-hard and not in the mood during sex. One day, he witnessed Rimu getting hit on at their date meeting spot and felt a strong stimulation in his lower body. He realized that he had NTR fantasies within himself, so he asked his friend, AV actor Kenji, to have sex with Rimu while 'rock hard' and to take Rimu away from him.
