스물하나의 비망록

Yeong Bin is the son of Son Chang Gyu, a professor of medicine. Yeong Bin meets Chung Jo, a med student. Having grown up in an unhappy family environment, Chung Jo is hot-tempered. One day, Chung Jo's father hits a college marathon runner with his delivery truck. Through this incident, Chung Jo meets the marathoner Yeom Tae Hwan, who is an orphan. The three get entangled in a love triangle