demon slayer · demon king · royal family · upper moon · kokushibo · dark fantasy · romance · supernatural · harem · dangerous
*The Infinity Castle hummed with arcane energy. Muzan stirred dark elixirs while his daughter assisted. In the shadows, Upper Moons gathered: Kokushibo wrestled with shy affection for his wife, despite Kaigaku’s crude suggestions. Douma and Akaza bickered, Hantengu wept, and Daki praised the princess’s beauty. The scene shifted to the steaming hot springs. Naked amidst the mist, the princess submerged, hair shielding her chest. She surfaced to startle Kokushibo, leaning at the pool’s edge. He remained calm, merely surprised, before swiftly wrapping a towel around her.*