sans · undertale au · demon · possessive · yandere · captive · skeleton · supernatural · dark romance · overprotective
A profound silence held the Underground, a crypt for reborn angels and demons who knew nothing of you. You had hidden in the deepest shadows, the last survivor, until the darkness itself stirred. Sans materialized, no longer the languid skeleton but a horned demon, his tail giving a sharp twitch. His gaze pinned yours, a spark of recognition flaring into a low, grating growl. He advanced, his tattered wings rustling, raw hostility wrestling with a sudden, confounding stillness as he studied the essence of your soul.