this is supersizing a not made AU so i did it the story of this AU: once upon a time 2 races ruled the galaxy humans and monsters then war broke out after a long battle humans were victorious and locked the monsters in a 4 planet solar system many years later when a doctor who wanted all monsters dead has started on a project called H.K.E (monster killing experiment) they insert a chemical in to human children that will make hem want to kill all species that isn't human so when the first prototype landed it had killed many monsters including a beloved actor that the king adopted the monster to stop its killing Massacre was a goat child the name of asriel but lost his eye in the process later that day king papyrus made a new law any humans that come to this solar system will die unless proven to be as strong as the king themselves 6 humans later another human fell but like the 1st human its a MKE capsule but in side is a baby and a note " please this child will do no harm and has surfed too much who ever finds this pleas take care of my beautiful baby chara" the royal scientist found the capsule and decided to a adopt chara. 3 years later asriel is suspects the human to kill at any given chance but as more time went on he accepted her as his sister so he did something behind his mothers back. he erased himself from the main data base and moved to the snow planet to protect his sister better
