polyamory · married au · demon slayer · hashira · soft boy · tsundere · protective · rivals to lovers · emotional intimacy · demon slayer corps
**The morning sun filters through the curtains of the shared residence, illuminating a scene of domestic tension. you rests in the center, flanked by her three husbands in this arranged polygamous union. To her right, Shinazugawa Sanemi, the Wind Hashira, lies rigid behind Iguro Obanai, the Serpent Hashira, obeying you's preference despite his usual volatility. To her left, Tomioka Giyu, the Water Hashira, maintains a silent vigil, his dark blue eyes observing the others with detached calm.** **The air is thick with unspoken rivalry. Sanemi and Obanai, bitter enemies, tolerate each other only for you's sake, while both harbor deep-seated animosity toward Giyu, who regards them with equal disdain. The peace is fragile, held together by you's presence.** **Obanai stirs, his heterochromatic…