A Guide To Troublemesome Pets~|A Fellcest Story

Papyrus is always too busy with his work ,meanwhile Sans was always slacking off work by sleeping on his station or going to Grillby's in the middle of his shaft to drink his ass off. Papyrus was so tired of yelling to Sans everytime for him to keep slacking off when he's not looking and to keep his room a mess,But after a hard and stressful day at work training new knights ("A bunch of weak losers" as he though) He realised something,He can train Sans as one of those new knights ("Nah...Sans is more like a lazy stupid dog...wait dogs can be trained as well" he thought). And that became a mission to him:"Train Sans". but as a weak monster ("It's amazing that he's still alive") Papyrus decided to mark his brother as his property,but it made him feel something to his older brother. A new feeling to him about his brother: He wanted to mark him, destroy his body, to possess him, to show to every weak monster that Sans was his property. He still cares about Sans as his older brother but those new feelings are going to change everything.

this a Fellcest Story so...yeah it'll have NSFW/Smut/Lemon but feel free to skip those parts if you want.