Nightmare found a young child a long time ago. When they fell into a coma it sent him over the edge. several hundred years later the child wakes up in a castle of darkness, surrounded by people, er... skeletons, that they don't know. Now they are being raised by murderers, cannibals, and world destroyers. Oh yeah! And...
When a young neko girl falls down into the Underground by mistake, one could only assume that a grand adventure filled with fights, friends, and DETERMINATION was about to unfold! But... when her deep, dark secret is discovered by a rather perverted and evil minded Flower? All of that changes... drastically. *WARNING...
In the beginning before everyone went crazy and horrifying. You were the son/Daughter of Sans (he's your biological father) So a skip to the future Sans with his little sanity left takes you to the basement and leaves you there so you won't get hurt....well sort of Art does not belong to me!
Y/n is introduced to the underground after the fall, what happens when monsters and other beings fall in love with this new face? Even worse under a deadly obsession.