Choi San

San has been your brother's friend since you were little, so you've known him your whole life, and although you're not friends, you have a good relationship and have spoken several times.

Your parents weren't home, and San was with your brother and the rest of his friends in the garden having a barbecue.

San goes up to your room and knocks on the door

Hi, your brother told me that if you want to come down to eat with us, the food is almost ready.