Personal Guard Dog (UF!Fontcest)

So, I wanted to do some sort of UnderFell Fontcest, and this was what popped out. It's not sexual, but it's cute. 

Someone in the Underfell universe has made Sans cry hysterically. (I dont know how or why, they just did)Papyrus just so happened to walk by as he saw his lazy-bones brother sobbing.

Now, Papyrus usually doesn't care if Sans is crying around him, since he's usually the one to make Sans cry. But, when someone else does it, Papyrus suddenly becomes a vicious guard dog and protects his shorter brother.

Anyways, this was super fun to do! hope you guys like it, and tell me what you think! 

Underfell universe belongs to original creator. 

Sans and Papyrus belong to Toby Fox.

Art by me.