Undertale : Something Lurking

An AU combining both Undertale and Omori. Also known as MV!Omoritale.
On a peculiar day, Sunny made a different decision.
He ran away.
He ran far.
He couldn't think. How could he have done that ? He hates himself... Then again, what did he do ? Why is he running ? Where is he going ? He could swear someone was following him for a good part of the time he spent running.
He stops. He needs to breath. Then he sees it : A hole in the ground of the mountain he didn't realize he'd climbed.

It's a long way down...
Do you want to jump ?