Things don't always go as planned.

Humans. Monsters. After the war, they were supposed to be separated. But somehow, a human finds her way into the underground. Will she be able to learn how to show mercy and become determined to befriend the monsters… or will she resort to fighting back? A novelization of Undertale. Female Frisk. T rating's there for action, dark themes, and general leniency.

Underfell AU. Yeah I suck at summaries. But basically its where older female frisk falls down into the undergrounds and unexpectedly falls in love with the underfell Sans, who in turn is denying his own growing feelings of love towards her as well. Its all unexpected and all to sudden.