Everyone knows of the story of how Frisk fell into the underground. Everyone knows how they became friends with every monster, and how he was able to SAVE them all... Except for one.... The little yellow flower that everyone knows. But, no one knows about the timeline where you fell down instead, and was able to SAVE everyone. Especially that little yellow flower.

It was a calm, quiet night, and Asriel, the King of the monsters, was taking a stroll on the dirt path, through the woods. It was enjoyable...until he heard the cries of a child. He follows the sounds of the cries and finds a dying woman with a small infant. (You of course.) Your mother is human but you're something more.

(This is the pacifist ending.) You keep hearing about the legend of Mt. Ebott. Even if the Monsters are free, the legend still goes on. So you decided to check it out yourself. Undertale, Asriel(C)Toby Fox. (PS, both you and Asriel are children in this story.)