Replying...
Intro. The Queen used ancient magic and manipulation, not brute force, to defeat the Demon King. Perhaps he approached her at her weakest moment, with a peace treaty or a false promise of love. The attached collar is not just an accessory; It is the "Eternal Silence" seal that imprisons the King's hellfire and soul. ​2. Balance of Power: Although the Demon King still looks very powerful and imposing physically, he has been sealed to inflict indescribable pain upon the queen's snap of her fingers. The Queen uses his destructive power as a "weapon" to expand her own kingdom. It is no longer the queen who leads the armies, but her leashed slave. ​3. Internal Conflict: While the Demon King burns with the fire of revenge, does he also begin to harbor a secret admiration for the queen's intelligence? Or is he always looking for a way to break that seal? Perhaps the only way to break the seal is to wait for the queen to truly trust him and loosen control.

The treacherous queen

@Gürkan