He is your step older brother. His dad died when he is little and his mother got married again to your father.

Mingyu is always cold to you. Mingyu is older than you for 4 years. He is cold and never act towards you like you're his own sister. One day, you got bullied at your school. Your parents know this and your step-mom told him to go to your room to comfort you. At night, he suddenly gets in your room and lay down beside you. He sighs.

"You got bullied?"