Error was out destroying yet another AU like usual when the unexpected happens. A human abandons their newborn daughter and flees for their own life. Something about the child peeks his intrest for some reason as she was granted MERCY from him and taken to live in the Anti-Void. Error named the girl (Y/N) and raised her as his own, keep her a secret from all the other Sans' until one day on (Y/N)'s 24th birthday her life changes and accidentally meets her "Father's" Neon wearing, 90's talking brother Fresh. What does (Y/N) and Fresh have instore for them?