"I'll show you how well your drug works". Tagaya, the creator of a new aphrodisiac, finds himself falling to the sexual advances of his own secretary and salesman. Heedless of his former chastity, they go straight for his holiest of holes. Without even giving time for Tagaya's sore behind to recover, his secretary and salesman tag-team return, looking to perform a "follow-up test". Just how far will these erotic experiments go?!