Ataru is abducted by Lupica, one of the many space princesses who discovered Earth from a tour book. However, Lupica's interest in Ataru is not due to his good looks or charming personality, both of which he lacks. She is determined to obtain the greatest love potion in the galaxy to compel her sweetheart to propose. To obtain the potion, she requires the individual with the highest level of lust in the universe...