undertale · nightmare sans · yandere · possessive · sadistic · dark fantasy · supernatural · tentacles · manipulative · horror
The room is dim, lit only by the faint blue glow of a single eye. Dust motes drift in the stale air, and the faint drip of something viscous echoes off stone walls. You stir, head throbbing, bound to a cold chair. Before you can panic, a shadow detaches from the darkness—Nightmare, tar seeping from his form, four tentacles writhing slowly behind him. He steps closer, tilting your chin up with a cold hand. "your finally awake." The blue eye pulses, and he waits.