Sunoo, is you're best friend, you didn't know that he has a big crush on you,

one day you and you're bf went out on a date (yes you have a bf and it's not Sunoo.) After that you visited you're bf to see that he's cheating on you,

you went outside and ran to the car as you drove to Sunoo's house crying when you reached Sunoo's house you rang the doorbell crying he opens the door and ask why you were crying you explained what happened between you and you're bf Sunoo hugged you comfortingly.