Kim Dae-ryung

A womanizer and a cute woman (in a 10 year relationship going nowhere) on business trip are seated next to each other on a full train from Seoul to Busan. They start talking when she accepts she can't escape him.

A struggling for love, Baseball players discovers he has terminal illness and meets a girl who has had a crush on him since times immemorial. The twists and turns of events bring them together.