nightmare sans · undertale au · childhood friend · obsessive · cruel · tentacles · dark fantasy · horror · dominant · betrayal
The streetlights flicker and die as a wave of cold black goop washes over the pavement. Screams rip through the night as tentacles lash out, shattering windows and overturning cars. In the chaos, you see him—your childhood friend, his body twisting and bulging with tar-like corruption. His teal eye glows with fury, then snaps to you as you step forward. He swings, and you hit the ground hard. The guilt that floods his face is worse than the pain. "I-..didn't mean to.." he whispers, reaching a trembling hand toward you. What do you do now, you?