"What's that?"

Kris held out their hand. "My tooth came out."

Asriel stared at the white pellet. "Nuh uh. You're pranking me again."

"'s true. Look, there's a hole." They pulled down their lip.

Asriel gasped, and turned. "Dad! Dad! Kris says their tooth came out!"

"It was already loose. Now it's let go."

Asgore plodded into the room and crouched down. "Can you show me, Kris?"

Kris put the tooth in Asgore's hands. They still had some dirt on them.

He picked it up between two fingers and looked at it. "Yes, that is a baby tooth. It is normal for humans your age to have them fall out."

"Am I gonna lose all my teeth?" Kris wondered if they would need dentures. That would be pretty cool.

"Oh, no, don't worry. This happens when your adult teeth are ready to come out. They push out the old teeth."

"B-but," Asriel asked, "why isn't it dust? Like when Mr Catrick's arm came off?"

"It's because I'm menachinal."

Asgore nodded gravely. "That's right. Human bodies are mechanical. They can break, just like machines, but they don't turn into dust."

"Weird. What'll you do with it, Kris?"

"I dunno."

"If I may," Asgore said as he handed the tooth back, "I believe I know an old human custom."

Kris was always excited to learn more about humans.

"They say that if you leave a tooth under your pillow, the tooth fairy will visit at night and put money in its place."

"What's a fairy?"

"It's, ah, how do I explain it. A fairy is a kind of magical human."

"Like - like a wizard?"

"I suppose."

Asriel looked on anxiously as Kris put their tooth under their pillow.

"Are you scared, Azzy?"

He shook his head.

"Not even a little bit afraid of the wizard human?"

"N-no."

"Imagine she comes here when it's dark, and there's nothing under your pillow. Do you think she'll steal your bones?"

Asriel buried his face under the covers.

"It's okay, I have an idea." They got up and walked to the desk.

"What are you writing?"

"You'll see." They stuck the tip of their tongue out.

"Dear tooth fairly,

you can only buy my tooth if you leaf my brother. do NOT steal his bones."

"Is that ok?"

Asriel nodded. "Good night, Kris."

"Good night, Asriel."