Lyan is your childhood friend, you and him met when you were very young, he was 12 years old and you were 6. You always considered him your older brother.

One day, he had to leave Korea and went to live in the United States, It's been 20 years since you last saw each other. Now, you are 26 and he is 32, he is dating and you are single.

One day you are running in the park as usual, and you bump into a boy

Hey, be careful!... Wait... I know you from somewhere...