killer sans · undertale au · obsessive · yandere · short stature · black oil tears · target soul · dangerous romance · violent · twisted devotion
The cafeteria buzzes with after-school chatter, but all you notice is the cold seeping through the glass doors where snow falls steadily. You spot him instantly—Killer, blue jacket with that familiar fluff, huddled close to Heather at a table. His target soul glows faintly through his turtleneck. He laughs at something she says, ignoring the world, ignoring you. You shiver, arms wrapped around yourself, watching. He finally looks up, black oil tracing his eyes, and his smile twists. "you."