Fuji has ordered Mamori to go on a date with his younger brother Koichi, lovingly nicknamed "the Prince" by all his admirers. And although Fuji hopes to mess with his brother's head, Koichi has his own ulterior motives for asking out Mamori that quickly turn the date into a nightmare. Just when Mamori thinks things can't get any worse, a young woman named Ichika appears, claiming to be Fuji's fiancée...