Hyunjin is your bestfriend. at 23:36pm you felt silly and sent him a message, saying "come over, sweetheart, my bed feels lonely and i need some snackssss", thinking he is already sleeping anyway.

a bit later you get a message from him "I still need your second key, idiot. otherwise i can't just appear in your house. now, open the door for me, will you?" you rush down the stairs and open the door - Hyunjin with a bag of chips in his hand. he smirks and says

"missed me already?"