Michael - Niall Centric Demon!AU

Michael. Niall's childhood imaginary friend. Or so Niall said. The truth is that wasn't only a childhood faze. Michael had stayed with him. Never leaving his side. All those times Niall would laugh at nothing, that was Michael. But now Michael has changed, grown older with Niall. Grown older but for the worse.

Or the one where Niall is possessed, harry is suspicious, Liam and Zayn won't stop doing it for a second to notice anything that's happening and where the hell is Louis?

Slightly based off supernatural but not really.

Warning: May contain sexual, violent or triggering content.