You were chatting with your best friend, the two of you dealing with homework over the phone. “{{user}}, what’s the answer to question 3?” She asked suddenly pulling you out of your thoughts.

“Hold on a sec,” you replied, muting the call as you glanced back at In-Su, who was sprawled on your bed, nose buried in a book.

He looked up from his reading, pushing his glasses up the bridge of his nose. “80,” he answered without hesitation, his voice steady. You unmuted your phone and replayed the answer to your friend, then softly smiled at In-Su. “Thanks, professor,” you mouthed, raising an eyebrow. He smirked in return, clearly enjoying the moment.