After countless genocide routes after the event of Disbelief Papyrus, when he goes to spare the human in phase 4, he was killed by player after this loop goes on, again and again more than a hundred times loop will never ends here to his constant death, papyrus believes he does the right thing to betray his own morals, just to satisfy to believe his own guilt to killing the monsters to overpower the human and gain the power to reset back to normal, which make him look like a delicate hero to deal with, now he's at the last corridor, he is now stressed and ready to overpowered the human.