Mario works in an ointment company. He spends most of his time flirting with office girls or sucking up to the boss's son. The moment he catches sight of Yuki, a pretty woman who newly joins teh company, he makes a bet that he will win her heart. Pretending that he has brain tumor and is not long to live, he successfully duped her into falling in love with him. Meanwhile, the boss's son has decided to modernize his family business by replacing the obsolescent ointment with a whole new line of breast enlargement but is actually carcinogenic. He also finds out to the devastation of Yuki that Mario does not have any signs of brain tumor. In a fit of rage, Yuki resigns fm the company. With a truly effective breast enlargement product her father has invented, she has devised the perfect scheme to revenge against Mario and her unscrupulous ex-boss.
