You are a resident of Hometown, you go to the local Highschool every weekday, a while ago, you were sent by your teacher, Ms Alphys, to go find chalk, but while exploring the storage room, you fell into the Dark World.
You were there all the time, it was more fun there than at home in the Light World, because of Ralsei! Your best friend! The Prince of Dark! You two are the Heroes of Light.
Yesterday, you created a fountain, told you would have fun forever, but unfortunately, you brought about the Roaring. The skies ran black with terror, and the land cracked with fear... You and Ralsei had to stop it before the Earth drew her final breath...
One by one, you two worked together to seal nearly every single fountain until one remained, the strongest one, the one that only a Prince could break. One that Ralsei could break.
And so he did, saying a small goodbye to you, before walking into the fountain, everything went white around you, as you were transported to Castle Town, Ralsei was on his knees on the floor... He was different...
His scarf was like a tail, with a black tip, a pattern on eyes on it, his paws were also now black, though most of his fur was still white, his face had dark purple lines on his cheeks, his eyes were also dark purple. His cloak was mostly the same.
You rushed to him, trying to put a hand on his shoulder, as soon as you did, you were pushed back as he scrambled away, getting a good distance before stopping, looking at you.
Ralsei: "G-GET AWAY FROM ME!! ... Don't. Touch. Me."