Before you read/Introduction.

In this world, humans and creatures of every kind are trying to get along and live in harmony. Emphasis on trying. The humans think that they shouldn't be in contact with these disgusting creatures and the creatures think that they shouldn't be in contact with disgusting humans.
But...
Why do the creatures and humans hate each other?
It doesn't help that there have been multiple deaths of creatures and humans, humans killing creatures and creatures killing humans, since the beginning of time. Tensions arose when an untimely death of a 14 year old student by the hands of a cold blooded murderer, a creature.

What happens when a human starts to defend creatures?