'''''How to Use Guys with Secret Tips''''' ({{ko-hhrm|남자사용설명서||Namja Sayongseolmyungseo}}; lit. "A Manual on How to Use Men"<ref>{{cite web|last=Elley|first=Derek|title=How to Use Guys with Secret Tips|url=http://www.filmbiz.asia/reviews/how-to-use-guys-with-secret-tips|work=[[Film Business Asia]]|accessdate=2013-07-23|date=12 April 2013}}</ref>) is a 2013 South Korean [[romantic comedy film]] starring [[Lee Si-young]] and [[Oh Jung-se]], and directed by [[Lee Won-suk]].
==Plot==
For the past five years, Choi Bo-na ([[Lee Si-young]]) has been overworked and underpaid as a second assistant director for TV commercials. Sorely lacking social skills, self-confidence, fashion sense, and aesthetic polish, she is casually disregarded by her colleagues and knows that her career is going nowhere. One night, she hits rock bottom. Stranded on a beach in the middle of nowhere after a grueling outdoor shoot, she comes across an eccentric middle-aged man selling inspirational videos. He urges her to buy his masterwork, "A Manual on How to Use Men," telling her that it will change her life and give her the skills she need to find success and happiness. She initially had doubts but buys the video eventually. After reluctantly following the step-by-step instructions of self-styled guru Dr. Swarski ([[Park Yeong-gyu]]), Bo-na's life takes a drastic turn. She begins to experience professional success and men start flocking to her (including top [[hallyu]] star, Lee Seung-jae ([[Oh Jung-se]]), who initially treated Bo-na with indifference).
