How to Use Guys with Secret Tips (English title) / Male Instruction Manual (literal title)(남자 사용설명서)is a February 14, 2013 Movie directed by Lee Won-Suk and produced by Kim Hyun-Shin, Yoon Chang-Sook, Eo Ji-Yeon South Korea.
Assistant TV commercial director Choi Bo-Na ( Lee Si-Young ) is tasked with doing anything and everything at work. Due to working so many hours, her appearance is always a complete mess. Choi Bo-Na also hasn't dated in years.
One day, her company shoots a commercial on location at the beach. Famous actor Lee Seung-Jae ( Oh Jung-Se ) appears for the filming, but he immediately complains about the tall height of the woman he is shooting the commercial with. Because of this, the whole concept behind the commercial has to be changed. Choi Bo-Na complains about Lee Seung-Jae's attitude, which makes Lee Seung-Jae dislike her even more.
After the filming is complete, Choi Bo-Na finds herself walking alone along the beach. The staff has already left back for Seoul without her. While waking on the beach at night, she comes upon a unique stall. The stall sells various instructional tapes. While she browses through the tapes, the persuasive seller ( Park Young-Gyu ) appears and talks her into buying a set - a $500 dollar instructional tape set on how to use men with different persuasive acts. The instructional tapes will soon change Choi Bo-Na's life.