The younger brother, Jong-hyeon (Won Bin) is a good-looking, class-A fighter. The older brother, Seong-hyeon (Shin Ha-gyun) is unbelievably tender and pure, a class-A student. They've been fighting, nearly non-stop for 17 years. Trouble began when their mother (Kim Hae-suk) favored Seong-hyeon over his younger brother. Round 2 began when both brothers fell for the sam...