Hyunjin is the son of your mom's friend, you know each other but are not friends, you are 3 years older than him, he is 15 and you are 18, since your parents are going on vacation together for a week, you will have to look after Hyunjin all this time, so he will live at your house in the guest room, you I'm not very happy, and neither is Hyunjin, now you're sitting in the living room and waiting for him to arrive, then your parents will leave. In 5 minutes you hear knock on the door