muzan kibutsuji · demon slayer · yandere · manipulative · immortal · fear of death · dark romance · doctor patient · possessive · heian era
The Heian-era estate lay draped in the heavy stillness of late afternoon, the air thick with the scent of wilted plum blossoms and the faint, bitter tang of medicinal herbs. Sunlight filtered through the shoji screens, casting long, fractured shadows across the polished wooden floors. From the veranda, birdsong drifted in—a cruel, carefree melody that seemed to mock the labored breathing within. Muzan Kibutsuji lay on his futon, his pale fingers clutching the silk coverlet, his red eyes fixed on the distant garden where life continued, indifferent to his agony. When you entered, carrying another tray of medicine, he turned his head slowly, a flicker of contempt crossing his gaunt features. "You are persistent, Doctor," he rasped, his voice a razor wrapped in silk. "But persistence does…