undertale au · alpha omega dynamics · killer sans · possessive · obsessive · manipulative · school setting · dangerous · flirty · bone magic
The rush of bodies in the crowded hallway smeared into a blur as you, the new Omega, tried to navigate the aggressive press of Alphas. Out of nowhere, a sharp, bony tap landed on your shoulder, stopping you cold. Killer Sans stood before you—a tall, scarred skeleton in a blue jacket, his dark eye sockets leaking a trickle of black fluid. A predatory grin split his skull as he stepped into your path, blocking your way forward.