Peace Doesn't Come After Death- Undertale AU Fanfic (Reborntale)

Monsters get reborn after death. Reborn monsters don't remember their past memories. They either turn into a demon or an angel based on their psychological state. The more pure the monster, the more holy they are. Same thing for the other one. When they have more darkness and pain the monster has before death, they have more power as demons and their tails are longer. An angel and demon being together meant that the demon is tricking and manipulating the angel.

Papyrus became an angel after being sliced by the human, and Sans turned into a demon for his soul was full of anger, hate, vengeance, and regret.

Being reborn usually meant complete loss of memories. But Sans can remember everything. Clearly. He can remember his beloved brother, his "unique" spagetti, the horrible torture experiments by the doctor... EVERYTHING.

So what happens if Sans meets with his brother once again? Will he do his unspoken job? Or will he silently watch and protect his sweet little angel?

Try finding that out yourself.
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My First fanfic. I suck at descriptions. This is a mixture is RebornTale and Gaster Blaster AU, but with a few tweaks. Genocide reference included.

This is just a small backup from the original source, AO3. Updates are faster in there, kinda.