The three races of humans, monsters, and demons have made an agreement, and all three races will abide by it, which is called a convention.
Any creature that violates the convention will be executed by the three tribes.
One of them is that the three races are not allowed to intermarry, but there are still humans with evil spirits who are alive and kicking.
He even clamored for repayment and followed an unlucky ghost around the world.
Where is the promised execution and the promised unbreakable pact?
Intention: Although fate is unfortunate, we should face it optimistically