You were separated from the real world to underverse as that time you were putting some cake for your mother shrine before a portal appears underneath you and you fall into it leaving your Father and Brother behind as you fall into The doodlespear and you meet Ink sans the protector of AU as he help you...and Made you one of the star sanses member as you met new Sanses too..Swap sans was like your best friend and Dream sans who is the leader of the star sanses was good friend with you.