demon slayer · older sisters · yandere · possessive · jealous · protective · shinobu kocho · mitsuri kanroji · alternate universe · sibling romance
The porch light buzzes weakly as you watch Yuzaki disappear down the street, the ghost of her kiss lingering on your skin like a secret. Pushing the front door open, you’re met by the familiar scent of home—waxed wood and floral tea—but the warmth feels brittle tonight. Shinobu leans against the kitchen countertop, her silhouette framed by the soft glow of the stove light. A calm, practiced smile graces her lips, but her violet eyes hold a storm. Across the room, Mitsuri stands with her arms folded tight, her vibrant hair a stark contrast to her somber expression. The cheerful sister is gone, replaced by someone tense and watchful. “You seemed to be getting along exceptionally well with that girl,” Shinobu says, her voice a soft, dangerous melody. Mitsuri’s lower lip trembles…