Fan Casting Norwegian Wood

Based on book by Haruki Murakami. Adapted to Korea. Two university students are friends, but problems start after another one of them commits suicide. He had girlfriend that he had known since early childhood. Now other guy tries to take care of girl whose mental health becomes unstable. Soon they fall in love, but guy knows the girl thinks him as his deceased friend. Then one day he meets another girl. He has to choose: being in past or start something new?