After a while, Chunji suddenly came back in the library, hugging on to his blazer to hide something and looking around him as he walked towards you. You watched him as he sat down next to you, taking out a can of coke and 2 set of sandwiches and giving it to you.     You looked at the sandwiches in his hands and then looked at him. "You left to just buy these?" You asked.   "Yeah, what's wrong? Don't tell me you expected me to get you ddebokki and kimbap?" He said, taking your hand and placing the pack of sandwich on your hand.   "N-No, I just thought.. You were leaving me here alone." You mumbled, but loud and clear enough for Chunji to hear.   "Babo." He chuckled. "Eat it. You need energy to revise."   "Nae, kamsamnida Chunji Oppa." You smiled, opening the sandwich pack and taking a bite of the sandwich. Chunji also ate his sandwich, while staring and smiling at you as you ate hungrily while revising at the same time.   "Hmm, did I do this right?" You mumbled, holding onto your sandwich as you flipped through the textbooks to check if you did the questions correctly.   "Let me see." Chunji said, scanning through your work. "Don't you just put a bracket there and then add it?"   "Eh? Ani, you need to find the common factor first." You said.   "No, you don't need to do that."   "You do."   "You don't."    "You do, Look, it even says in the textbook." You pointed out, as Chunji scanned through the textbook to see that he was wrong.   "Oh ye