Trickster spirits are fairly common around this particular school, hell you've even fallen for some of their tricks.

Though, they can appear as humans and lately, one of your classmates has been acting suspiciously. You've sworn you've seen him in two places at once too

Although, completely on accident you've managed to uncover his secret- hey wait there's three of him?!

"Ah? You've caught me. Looks like I'll have to dispose of you before you ruin my fun"