After a long day, you decide to take a walk. You see a mountain, so you decide to climb it. But you trip and fall into a hole. Everything is different down here, you landed on a pad of flowers that saved your fall thankfully. You see a flower pop out the ground.

??? : Hiya, I'm Flowey!

He seems trustable, but is he?

Flowey : I'll be your guide throughout here. Not much humans have been falling down here!