1. child hood

This book may contain violence,curses, and lemons i think

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Frisk and sans met when they were 6 its love at first sight frisk is gaster's experiment over the years gaster treated frisk as his own daughter
with a dust soul of human and monster together frisk turned into a hybrid and she started to learn magic from sans when they were 8, 4 years later after gaster made a machine and put frisk in it after the experiment frisk just disappeared and nowhere to be found