Perswap AU (Perswap = Personality swap) TSAMS

An unknown entity

This is my first time doing this so sorry if this is really bad-😭😭👉👈

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It had been a few days after Sun had suggested separating with Moon. Moon had agreed to it and now they both had their own bodies. They were both getting used to adjusting and seeing each other face to face, and it was soon becoming normal.

Moon had been stacking the barrels and tiding the daycare from the deepest darkest crevices to the entire jungle gym. He had been restless the first few days. But today was different... He could feel a strange presence inside him, like when he and Sun were still in the same being. But it felt different... It couldn't be Sun, he and Moon had separated... So what was this feeling? Moon shrugged it off for now, just continuing to sanitise the daycare floor.

While Moon was tidying the daycare floors, whilst humming the daycare tune to himself, he felt himself get... Irritated for no reason. As if everything was pointless... Nothing made sense... The right thing was the wrong thing and the wrong thing was the right thing...

"N-No, what is wrong with me... Just keep cleaning..."

Moon mumbled, sighing. He picked up a barrel, and started to stack them. He placed it down and then placed the second on top of the first, then the third on top of the second. There we go, a great stack of barrels! Despite it being the 1000th time he'd done this...

He heard a sudden voice in his head... He didn't know who or what it was, or who was causing it... 

"Hehehehe~"

The voice giggled, as it sounded like him but his voice was lower... Who could that even be?... Moon felt a sudden sharp pain at the back of his head. Moon grumbled slightly, and clenched his fists as he held his faceplate. He was starting to get a headache... Dammit. Why now of all times? Was the voice in the back of his head causing this?...

"Ow... W-What's happening..."

Moon groaned, before he felt his consciousness slipping away within a couple seconds, and soon he closed his eyes, asleep within a heartbeat. The pain was gone, and now Moon got back up again... But he looked around almost as if he'd never seen the place he'd been in only seconds before. This wasn't Moon... Who was it then?

"Finally... I have control over this idiot. Now... Where the hell is that other idiot?"

The unknown being muttered, sounding like Moon but not. He looked around again, chuckling lowly, before striding towards the desk where the computers are, probably checking out what stuff they had on them and if they could be useful to him.

Suddenly a familiar face, Sun, walked in, turning to the desk where the computers were as his expression brightened a little when his optics laid onto his 'brother'.

"Hey Moon, if you could help me a little then that'd be fine."

Sun said, before looking at random papers in his hands for something weird. It looked like some sorta weird set of instructions, and then a star shaped object for reference. It looked weird, but the unknown being's eyes widened slightly as he laid his optics onto the star shaped object reference.

"Of course, dear brother~"

'Moon' replied, mimicking Moon's normal voice to try fool Sun. Sun looked up from the papers at Moon, frowned for a moment before shrugging it off. 

- { He's probably just messing around... } -

Sun thought, before sighing. He pointed out some information that the sheet contained, and 'Moon' looked along, fascinated and wanted to know more... He WANTED that object... All for himself...