The Days of Being a Butler in the Monster King's House

After the war between humans and monsters, the seven strongest human magicians set up a barrier and sealed the monsters underground. As the first naturally born monster after being sealed underground, Cato was picked up by Gessen and went to his "new home" together to witness the king's speech. "It's your turn, Mr. Fluffy~" the queen said to the king with a smile after finishing her speech, but forgot to turn off the microphone. "You said you were born naturally? But in fact, according to our guess, monsters will not be born naturally at all." The Bone Brothers in the laboratory looked at the cat and turtle in front of them suspiciously. And the ordinary daily life here is about to be broken by the human beings who fall from the sky... This article is an Undertale fanfic, a group portrait, the male protagonist is not invincible, and contains a lot of secondary creations. Readers who have not understood the original work can also read it normally~