Dahyun's twenty years old and just got out of another relationship that she'd rather not remember anytime soon in her remaining years of life. Chaeyoung is her bestfriend, also single after being cheated on by her (then) one-and-only.

"Hey Hyun?"

"Hmm?"

"If we're almost thirty, and we're still single, let's just date each other." Chaeyoung whispered into the older's hair as they cuddled on Dahyun's bed after the latter cried her heart out.

"Mm... Heck, Let's just get married at 30." Dahyun replied, too tired of love as of the moment.

"Then... promise?" Chaeyoung held out a pinky, and Dahyun did her best to keep from laughing at the cute gesture, copying it.

"Promise."