This is an AU where Sans is a general for the monsters in the Great War- the war between the humans and monsters. Frisk is a assistant for one of the the generals for the humans.
The sleeve of his uniform was turning red. Sans grunted as he pulled up his sleeve, staring at the bone. There was a large crack, leaking marrow. He groaned, looking around. His LV was high, meaning he wouldn't die...
Yet.
He needed to get back to his soldiers.
The crack of a stick made Sans look up.
A human girl, dressed in the navy dress and coat, of a general's assistant stared at him. Her brown hair was tied back with a scarlet bow, revealing that she was very pretty.
Sans growled, snapping his fingers. Bones appeared, ready to sink into the young woman...
Then her fingers pressed against the wound. He grunted with the pain as she stared at it in concern. The human quickly reached into her pocket, Sans tensing as he readied for a dagger to sink into his SOUL...
It was a water bottle.
She poured the water over his wound, washing away the marrow and shards of bone. Then her gloved hand yanked the ribbon out of her hair, letting her brown curls flow freely. The ribbon bound his wound, Sans noting how effortlessly she did it.
Then the young human stood and walked away.
Sans stared down at his wound, opening his mouth to speak...only to realize that she was gone. The skeleton looked down, noticing something on the ribbon.
FRISK was written in neat cursive.