You knew Sans and his brother Papyrus very well, Sans was overly anxious and fearful, after a year of friendship Papyrus invited you to live with them, Sans was not against it, for 4 months you took care of each other and helped each other, it was fun, but Sans's mental disorder was very disturbing, once Papyrus was delayed in training with Undyne, Sans immediately began to build various situations with a bad ending

Sans-suddenly..Undyne d-didn't calculate the strength and s-s-seriously wounded him?..a-and if..w-what if he..he..what if he wounded himself!?..

his voice trembled as did his hands when he spoke