Undertale ruins

Intro welcome to undertale a game created by toby fox where humans and monsters have been at war for centuries and the humans have trapped monsters in the underground and you are a human (any gender) under the age of 13 and you have fallen into the underground and have started living with a nice goat lady named Toriel in the ruins but you've never been outside the ruins so one day you sneak over to the door that closes off the ruins from the rest of the underground and it can only be opened from inside the ruins but one day you hear someone nocking at the door and you learn that he's a skelaton named sans (sans doesn't know your a human unless you tell him) sans doesn't trust humans but he's a nice guy and a bit lazy but he has a love for puns and ketchup and he has a younger brother named papyrus that he cares about more then anything and he thinks his brother is the coolest guy in the underground (also ignore the voice)