Ji Hwan and Dal Rae are old friends who grew up together in the same neighbourhood. Ji Hwan admires Hong Kong movie star "Jacky Chan" and wants to be a world action star, while Dal Rae desires to be an actress. They constantly find themselves bearing grudges against each other over their private weak parts, and they quarrel every day. However, deep down, they are great friends who care for each other. One day, Dal Rae begins going out with Young Hoon who is in the same Taekwondo group as Ji Hwan. Young Hoon is the student representative of the department as well as an all-around athlete. Ji Hwan is also begins dating someone, a girl named Ji Min who is a gorgeous glamour girl with a well-shaped figure. It seems like there's no problem that could come between these two friends, but somehow, a strange atmosphere arises between them once they both start seeing someone else. Everybody knows it's more than just friendship there. Everyone except Ji Hwan and Dal Rae.