Summary: Killer isn't too fond of the new guy.

A/N: A short Killermare story for a friend- since it is taking an eternity to complete the original one I promised them.

Killer huffed and crossed his arms. All the while, leaning back against the kitchen's doorway and glaring as he begrudgingly watched the dark lord he'd vowed to follow fret (as much as the negative being was capable of) over the fluffy, monochrome nuisance they'd recently picked up from an empty AU. Despite Killer's insistence to leave him.

Cross - the new monster to their ragtag group of murderers - looked down at the ground in shame while Nightmare lightly chided him for barely touching his lunch and hiding training injuries. After which, the ex-Royal Guard was promptly dismissed to his bedroom for the "rest his body desperately required."

A location that the target-souled skeleton bitterly recalled laid closest to the negativity-laden guardian's own quarters.

Nightmare must have sensed his growing irritation because he soon turned his cyan gaze over to Killer. Thus, causing the Sans' twisted soul to quiver into the loose shape of an inverted heart for a millisecond before returning to its usual target-like appearance.

However, despite how he wished to revel in the other's attention, it failed to quell the sheer ire he felt for the armor-clad swordsman- just another thing their newest addition had ruined.

Nightmare stepped closer, frowning as he looked him up and down- examining, looking for a problem. "Killer, you have been rather... moody for the last few days. What's wrong?"

Killer scoffed, scowling in the direction Cross left in.

"Nothing's wrong; I'm fine." He growled.

Nightmare followed his gaze. The dark lord's teeth curled into an arrogant smirk, and he cocked an invisible eyebrow while amusement sparkled in his eyelight. "Are you... jealous?"

Killer flinched at the accusation. "What? No! I just don't see why you need to spend so much time with the rookie! It's not like he'll die if you leave him alone for a few hours-"

Nightmare rolled his cyan eyelight. Then, before the target-souled skeleton had a chance to process the action, he suddenly leaned forward and clicked their teeth together in a chaste kiss.

"There," The negativity-laden guardian said, pulling away with a (presumably) pleased grin. "Now stop complaining and get back to work. I expect several AUs drenched in negativity by the end of the day."

Killer dumbly nodded, a deep red hue quickly working its way up his cheeks.

"S-s-sure thing, b-boss." He stammered.