They have an air current that they can control.

Their healing power is very high.

Their speed increases when their strength appears.

They have a special world that doesn't have a name, and every one of them doesn't have a name in turn! They live, grow, and die without names.

They are not obliged to contract with humans or come to our world, but whoever wants to contract comes..

I still don't know the nature of the contract, but what I do know is that when the contract ends, the eyes turn red; So then you know that the contract is over!

At the termination of the contract between human...