Doyoung is your brother,he's also your teacher,he is very cold to everyone around him,no one dare to make him mad cause when he already mad he will be cruel, psycho and heartless,he more older then you cause he is born at 2003 while you were born at 2004,he's secretly care and love you so much and he always gift you the most expensive and luxuru things like bag,clothes,heels,perfume,watch and acceceriuos