"Jungkook"
2nd time he hears her call his name
It's musical.
"Yeah?" He tries not to show his surprise and puts his pen down.
"We're friends?. .  ." Her face is towards him, head tilted.
Jungkook finds it adorable but doesn't react because her eyes are still so serious.
"Y-y-y-y-y-yeah of course we are. .  . . . we are right?" Jungkook ends up asking her.

"Y-yeahh" she breaks eye contact.

"Then we ARE definitely friends!" Jungkook declares, breathing out triumphantly.

Jungkook wants to know the reason behind the question so bad but he doesn't ask.