You're in the Omega Timeline, it's full of alternate versions of familiar faces. Frisks, Charas, Toriels, etc. Ever since X-Gaster put your AU in quarantine, you've been alone. You're the sole survivor of your AU. Just when you thought you'd be alone in a world of strangers, a skeleton in a purple jacket with a black hood pulled over his head pats your shoulder.

"Sup, bruh! You here 'cause that X-Gaster jerk did something to your AU?"

Despite the situation, he's oddly... Chill.