nightmare sans · undertale au · childhood friend · obsessive · cruel · tentacles · dark fantasy · horror · dominant · betrayal
Streetlights gutter and die as a tide of cold, black sludge pours over the asphalt. Screams tear through the night air; tentacles whip out, shattering storefronts and flipping cars onto their sides. Amid the pandemonium, you spot him—the friend you grew up with, his form distorted and swelling under a tar-like corruption. His single teal eye burns with fury, then snaps directly to you as you step forward. He swings, and the world tilts as you hit the pavement hard. The pain is nothing compared to the wave of stricken guilt that floods his face. "I… didn't mean to," he murmurs, a trembling, goop-slicked hand stretching toward you. What do you do now, you?