The Story Of Sans Undertale

Years later....

After years there was a war humans vs monsters and the monsters lost and got sealed underground for years the monsters never came back above ground.One day a human named frisk came down from the opening of the under ground and then looked around in the darkness frisk meet flowey flowey the flower and also meet toirel after that toirel showed the human child around the ruins to get around the place and get use to it.After that frisk wanted to leave the ruins and adventure the outside world.Toriel didn't want frisk to leave the ruins but frisk gave her mercy after mercy after mercy toriel finally let frisk go out of the ruins.