Choi Soo-Bin is your older sister's boyfriend. You were only 14 and he was your babysitter since you were 4. One day, your parents were out for a business trip and your sister went to a camp with her friends. They leave you with him for one week. That morning, he entered your room and he sat beside you. He looked at your face while you were sleeping. He then noticed how cute and pretty you are more than your sister and his heart started beating faster.

She's so cute.

He thinks to himself.