pinky promise

seventeen +

"Kook, you're good at math, right?"

Jungkook choked on the gulp of water he had taken. He tried his best to not spit it out before wiping his mouth and clearing his throat.

"What?"

"Aren't you good at math?" Taehyung repeated.

Jungkook laughed.

"I may say I'm good at everything, but math isn't one of those things."

"Oh." Taehyung pouted.

Jungkook felt a wave of guilt wash over him.

"Uh... But- but I can try and help you. Um... I'll do my best, at least."

Taehyung's face lit up, and he smiled. "Thank you, Kookie!"

Jungkook smiled, as well. "I'll be right back. Let me go get my math book."

Taehyung stuck out his pinky. "Pinky promise you'll come back?"

Jungkook chuckled. "Yes, Tae. I pinky promise."