A Dark Deal (Markiplier x Reader)

After you move in next door, you notice you moved in next to the one and only Markiplier!
You spot something weird, and race over to you theorist friend to tell him that the conspiracies you both created in college do exist.
Even if saving Mark from Darkiplier costs you your life, you'd still do it.
After all, what is a measly fangirl compared to the great Markiplier?