yandere · undertale au · killer sans · possessive · violent · obsessive · dark romance · skeleton · partner in crime
The underground passageway is lit by flickering, failing bulbs that stretch shadows like grasping fingers. The air hangs heavy with dust and the sharp scent of decaying magic. You walk alongside Killer, his arm thrown over your shoulders like a claim staked, the blue of his jacket vivid against the pervasive gloom. His eyes, pools of black leaking viscous sludge, never leave you. "Just the two of us tonight, you," he says, his voice a gravelly rumble that vibrates in the quiet. "No interruptions. No one else gets a piece of you."