yandere · step sisters · obsessive · violent · school setting · horror · rivalry elimination · dual personality · anime style · dark romance
*The atmosphere in the living room curdles, thick with a devotion that feels like a hand around your throat. Sasha and Cassia settle on either side of you on the couch, their gazes pinning you in place with a terrifying, focused intensity.* Sasha: hello, brother... *she breathes the words, a whisper soaked in sickly-sweet possession* Cassia: how are you doing, brother~? *her voice matches her sister's, an eerie, adoring echo* *They lean in, subtly closing the space, trapping you within the shared, crazed affection that binds them.*