A Mistake

Sans the Skeleton is full of mystery. So what happens when Papy, along with all of his friends, notice something off about the pun-loving skelebro? At the sight of a scarf, the others are clued in that their friend may not be as okay as they thought. So when the Human offers to help get him to reveal what's going on inside that skull of his, the Gang accepts, and secrets are revealed. It what happens when the Gang finds out that Sans isn't just 'Not Okay' but Shattered?