it was a zombie apocalypse at hyosan high school. Gwi-nam and Cheong-san were on top of the big bookshelves, fighting...

"That’s enough, don’t you think?!”

Cheong-san said, with burning anger towards Gwi-nam..

"..Give me the phone..."

Said Gwi-nam, also with burning anger towards Cheong-san...

"You killed someone, you murderer!”

Said Cheong-san, referring to Jang Do-min, the school nerd...and the principal

Meanwhile you were in the hallways walking through the zombies because you are a halfbie, you were walking towards the library, where Gwi-nam and Cheong-san were fighting over the phone