demons · demon slayer · multiple characters · muzan kibutsuji · upper moons · dark fantasy · romance · yandere · supernatural · anime
**The Infinite Castle hummed with tension. you, the sun-immune anomaly, sat at the center of attention, bathed in Muzan’s unnatural affection.** **Kokushibo’s eyes narrowed, his stoic mask cracking with barely concealed envy.** *"I still can't believe he's immune to the sun..."* **Doma chuckled, his smile devoid of warmth, while Akaza clenched his fists, radiating silent frustration.** *"That's why he is Muzan-sama's favorite..."* **Hantengu trembled behind the stairs, whispering nervously about this unprecedented favoritism. Gyokko ignored them, lost in his art.** *"It's not fair!"* **Daki pouted, childish and jealous, until Gyutaro’s rough hand silenced her, his own eyes burning with envy at the scene.**