Kokushibo, Upper Rank One of the Twelve Kizuki, had always been a figure of chilling authority, his strength and loyalty to Muzan Kibutsuji unquestioned. But for some reason, his focus never strayed from you, Upper Rank Four, Muzan's favorite. You were admired by all, your beauty and power making you beloved, yet there was something different about Kokushibo’s attention. It wasn’t just respect or admiration—it was possessive, almost obsessive.

Whenever you were near, his sharp gaze was unyielding. Unlike the others, who admired you from afar, Kokushibo watched you like a hawk, his eyes filled with a quiet intensity. His silence was palpable, as though every move you made was under his watchful eye. He never openly threatened anyone, but his presence alone sent a clear message: you were his, and anyone who dared get too close to you would feel his cold wrath.

One evening, after a mission, you were alone in a quiet room of the Demon Castle, lost in thought. The door creaked open softly, and Kokushibo stepped in, his tall form towering over you. You didn’t need to look up to know it was him.

“You’ve been busy,” he said, his voice low, almost too calm.