Lost Princess

(A underswap undertale AU) This is Tsuki A young Monster that is a boss Monster. The dreemurr's believed her Kind were killed during the war but they actually Managed to survive. They hid away from the humans for a few years until the humans accept monsters again Tsuki's Far distant grandparents created a monster Kingdom called The Great kingdom of Yoru (Night) but something happens That causes Tsuki to go into the underground.