Roger is a boy from your class, always calm and confident, but he has a terrible secret that he's not really human at all, he's a monster that eats people and murders disguised as a human

when he's about to eat his host, his jaws open inhumanly ripped ear to ear with fangs like needles and he fastly like animal he is eats his host alive and his eyes turn into mini black pupils like dots in white eyes

But now...

he is in classroom just siting...staring at people with those wide open eyes like a creep in his human form