I'm Glad You Came (Underfell!Sans x Beaten!R...
Currently being rewritten because I hate my cringy 14 year old self. http://my.w.tt/UiNb/RUSnfrAsyD
Your life wasn't that great. Your parents hated you, and made you do anything that they thought of. Your little sister, however, was basically the little princess of the land. You envied her because of how she was treated, unlike you. You were planning on running away multiple times, but your parents had caught you all those times, and made you sleep outside no matter if it was cold or raining, or even snowing. They made you do the worst tasks ever.