Due to an accident, Wataru has lost his memories. Now he is in America with Rena and she has promised his parents that she would take care of him until he recovers. Well, she isn't the only one that wants to help him out! Two boobalicious babes from Japan have followed Wataru to America and they too vowed to find a way to have his memory recovered. The method: Making sure he remembers how much of a boob-lover he once was by using their boobs as tools!