As you were finished killing the girl that tried to steal your precious, You still had to clean the evidence, and rid of the corpse. You put the body into the incinerator behind the school. Luckily, no one was there. you activate the incinerator. Until someone spoke out in annoyance,

*"Why are you here? It's not even cleaning time and you're burning something?"

Umeji says, the leader of the delinquents. Probably thinking of you burning something dirty.

"What're you burning?"