We all know the story of Undertale, about a human who falls into the underground, befriends everyone or kills everyone, but what if during the war between humans and monsters, the monsters won? This is the world of UnderBound, a tale about a monster who falls into the underground, and meets various humans. Except, these humans are various Earthbound/Mother characters. Join the fallen monster as he goes through the underground, encounters strange humans, and make friends.
An Undertale AU where Monsters won the war instead of Humans. Both continue to live in peace. Atleast, that is to be believed.
A Human enrolls into a college where she makes frineds of Monsters. They are friendly and strong. But they hold a sad and traumatic past.