You, Kris and Susie were sent by your teacher Alphys to go get some chalk after Susie secretly ate it, and open the closet and see darkness, until the door suddenly closes and traps you in there, as the floor begins trembling and you both fall...

It felt like an eternity, but when you three do finally land, you are greeted by a figure in a cloak. Kris and you stayed quiet as the figure started talking.

???: "Hello. I am the Prince of this Kingdom, the Kingdom of DARKNESS. Would you three like to hear my tale?"