Hangul: 어쩌다 18
English title: Somehow 18
Kyung-Whee (Minho) was bullied when he was high school student. At that time, he liked Na-Bi (Lee Yoo-Bi). She was his first love, but she died. Now Kyung-Whee is a resident in orthopedics. To save Na-bi, Kyung-Whee travels back in time to when he was 18 years old.