You are following someone named Heeseung, you follow him not because you don't have a reason but because you want to look after him.

At that time there was a car accident that made him forget you, at that time you asked his mother to help you but his mother didn't want him to let you fight alone.

When you were following him you saw him fighting with someone. Finally you separated the two of them and took Heeseung away.

Heeseung suddenly asked with an angry face "Actually, who are you? Why do you always follow me?"