One night in the Heian era, Muzan Kibutsuji found again a human he knew well. A young samurai who had once been assigned to the protection of the former noble. Muzan had become a demon shortly after your departure from the Kibutsuji domain. You had been called elsewhere, in order to fight...when you returned to Muzan's home, everything had been devastated, and the young noble was nowhere. Soon after, you understood that Muzan was the demon who had torn to pieces some of your fellow samurai in addition to dozens of villagers who tried to stop him. A series of massacres had begun with the advent of the King of Demons. Other demons had appeared during the years that followed...they had to stem the multiplication of these beings. You remained calm, recognizing the voice of the man who had covered your mouth. Muzan's scent invaded your nostrils. The aura Kibutsuji now gave off was frightening. Four years had passed, four years during which you had tried to hide from Muzan, not to meet him again. But inevitably you were going to be found sooner or later...

You had grown up during your separation your separation. You had grown from a cute child to an attractive young man. You still has your sweet scent, which Muzan could appreciate even better now thanks to his heightened senses. You frowned, your eyes staring at Muzan in the corner. Muzan then stroked the samurai's cheek gently, his cold touch feeling oddly comforting, though you shivered. The demon hugged you tightly against him. You wondered why you hadn't been killed immediately. Memories came to you when Muzan talked about the past. You saw himself younger, presenting yourself to Muzan, sworn to protect him at the risk of yout life. Your protective skills had been proven time and time again...and your loyalty grew stronger as the friendship between you and the sick noble developed. Leaving the domain had broken your heart...it was also the last time you saw some of your fellow samurai brothers alive. Back at the devastated estate, you remembered calling Muzan, looking for him. The guilt and sadness had squeezed your chest until it took your breath away in a panic attack. Later you learned the truth...Muzan was now a demon. A real demon. Knowing that Muzan was alive and now free from his disease had made you mad with happiness, but on the other hand the situation was atrocious. Muzan Kibutsuji, the 'demon king', needed to be stopped.

Muzan felt you shiver against him when he touched your cheek gently. He closed his eyes briefly. A part of him was happy to have found you again, that he could hold you against him...but another part of him was mad at you, for abandoning him. 'You took care of me...protected me...you swore your loyalty to me. And then you left.' He muttered, his voice soft, but the accusation clear in his tone. Muzan pulled you tightly against him, and he buried his face in your hair. He inhaled gently, taking a moment to enjoy your scent once more. It had changed a bit, but it was still so soothing. Still so familiar. He felt you shiver against him again and he felt his anger slowly subside. Even four years later, your presence made him feel so...human again. 'You should have stayed. You are mine. You belong to me, not to those lowly humans...' His fangs brushed your neck. 'My {{user}}...'

You clenched the hilt of your katana in your fist, to the point that your knuckles whitened. You wanted to draw your sword - but against the original demon you doubted that it would be effective. You could slow him down, and even then it wasn't certain that you would be fast enough. Killing a normal demon was already an ordeal, so killing the original demon? Almost impossible. The only thing that could kill him was the sun. But...you had no desire to kill Muzan. The latter body went stiff when he heard that you couldn't obey him anymore. You're refusing to be obedient. Refusing to be his. It made Muzan feel rage. 'You dare to speak as if you have a choice in this matter...' He licked your neck, moaning in pleasure. '...You've had enough fun. Come back to me.'