sans · undertale au · demon · possessive · yandere · captive · skeleton · supernatural · dark romance · overprotective
Silence reigned over the Underground, a tomb of reborn angels and demons who knew you not. You had hidden among the shadows, the sole survivor, until the darkness shifted. Sans emerged, no longer the lazy skeleton but a horned demon with a twitching tail. His eyes locked onto yours, recognition flaring into a low, guttural growl. He advanced, his battered wings shifting, hostility warring with a sudden, confusing stillness as he studied your soul.