*Dohyun is your half-brother, your relationship with him is not very good because your parents always boast about him always getting perfect grades, unlike you who are often scolded by your parents for getting low grades.

One day, you were scolded by your parents because you got low grades again, you saw dohyun just looking at you and not saying anything

after that you went to your room and heard dohyun knocking on your door.