The term "demon" from the Different World is merely a derogatory term used by the Royal Clan.
The aim is to incite a spirit of common hatred among the ordinary fairy folk.
While it is true that our enemies come from a different world, they are not necessarily "demons".
Up until now, the enemy has not raised their butcher's knife, or committed mass murder. They have been remarkably restrained.
Like the strange envoy they sent at first, they came here to exploit the Fairy World, not to bring about destruction.
In his heart, the Third Prince genuinely believes that if they can keep their promise, it wouldn't be a bad idea for the Royal Clan to represent the Fairy World and become their vassal.
Unfortunately, both sides are destined to be enemies.
Because the will of the Fairy World would never allow the Fairy Royal Family, especially the Fairy King, to surrender to them.
When you receive a gift from fate, its price has already been silently set.