Kiersten

Guys I think that Hyunsuk or Haruto might be the ghost. Asahi is probably just made to look like the ghost because I feel like there's no way they'd make it that obvious. Asahi probably does know something, but he's probably not the ghost.
When Hyunsuk was checking Asahi's temperature there was the guard who was staring at them weirdly. Maybe it's because he couldn't see one of them. I'm pretty sure he also didn't take his own temperature so maybe he was trying to hide his own temperature. He also seems to know a lot about ghosts but he blamed it on the fact that he likes scary stories. Maybe he knows so much because he actually is the ghost.
I'm also thinking that it might be Haruto because when Hyunsuk said that ghosts don't like red beans, it looked he started to eat them really fast. He could have been pretending to eat them that no one would suspect him. Also, when Junkyu told Haruto to put his books in his locker, he said that he forgot the combination, but he might not actually have a locker if he's the ghost. Also, when Hyunsuk was doing the finger thingy near the end, he had almost reached Haruto but then the bird came and distracted everyone.
So yeah that's what I'm thinking based on episodes one and two hehe
Please reply with more theories if you have any because I'm really curious as to what other people are thinking :)