The story opens with Ascathon, a god of Chaos, dying in the aftermath of a universe-shattering conflict he waged against Myrm, the god of Order. Ascathon reflects on his unique soul-cutting weapon, ironically turned against him, and the absurdity of a god succumbing to such a mortal end. He's resigned to the cycle of reincarnation, but then Seria, the Goddess of Life and Death, makes a dramatic, high-heeled entrance to deliver the Council's judgment. She's not here to finish him off but to strip him of his divinity, condemning him to be reborn into a mortal life to "learn from your mistakes." This isn't a fresh start with power, but a forced humility. Angrod wakes up as a prince in the Tirna Kingdom, slowly regaining memories of his past godhood. His new parents, King Nicol and Queen Ireth, are fiercely protective, hinting at a hidden past and dangers lurking within their own court. The comfortable, isolated life of a prince feels hardly like punishment, leaving Angrod to wonder if Seria botched the job or if a deeper, more devious plan is at play.

Angrod, now five years old, is brought to a "congregation" ceremony, a public ritual meant to introduce young nobles to society and receive a prophecy from Seria. The temple's artwork chillingly depicts his past war with Myrm, hinting at a truth his mortal parents don't grasp. To his horror, Seria herself appears, not as a vision, but in physical form, scantily clad and enjoying the chaos she causes. She unveils a prophecy board that reveals Angrod's true identity as a "Fallen God" and "Doomsbringer," offering two paths: destroy the world, or marry the "first princess of Stricc" to save it. The princess of Stricc is none other than Celes, the reincarnated Myrm. Their recognition of each other is explosive, culminating in Celes tackling Angrod and stabbing him with a hairpin. Their parents, witnessing this divine spectacle and the violent reunion, are left reeling, deciding that the only path forward is to force the two eternal enemies to learn to coexist.

Angrod and Celes are subjected to "lessons" by their parents and Angrod's eccentric grandfather, Nicosar, designed to force them into a semblance of peace. These lessons range from dance classes to bizarre "love training" aimed at making them a convincing couple for their future political union. Angrod, initially resistant, discovers his headaches are a sign of his latent powers returning, specifically his "organic enchantment" that is slowly turning his skeleton into dragonbone, enhancing his body. Celes, a master of "internal mana manipulation," showcases her brutal martial arts prowess, easily subduing opponents. Their shared torment and mutual enemy (Nicosar's "perverted" training) forge a pragmatic alliance. The political climate outside their sheltered upbringing darkens, with the "Patriot faction" attempting assassinations against the royal family and escalating their anti-peace agenda, hinting at a larger, more dangerous game afoot.

Angrod's coronation is set, but it's no peaceful affair. His uncle Seredorn and cousin Markorn, backed by the rebelling Meltheim and Tulhelm families, challenge his claim to the throne. Angrod, having just replenished his mana reserves by siphoning power from a fusion reactor in his secret lab, reveals his true, brutal nature. He delivers a chilling ultimatum to the assembled nobility: stand with him or be eliminated. When Markorn challenges him, Angrod teleports, instantly killing Seredorn by ripping out his heart and then animating the corpse as a zombie. He then brutally dispatches Markorn, not just physically, but by stealing his soul. This public display of soul magic, necromancy, and overwhelming force sends a clear, terrifying message to the nobility: Angrod is not a king to be trifled with, and his rule will be absolute. The cost, however, is immense: his father Nicol is killed in the Meltheims' attack, and the kingdom plunges into open civil war.

While recovering from his coronation injuries, Angrod experiences a dream-like communication with Seria. She reveals the true nature of their reincarnation: not just punishment, but part of her long-term rebellion against the Council of the Seven, the true rulers of the multiverse. Angrod's world is a "Void Zone," a hidden dimension where Seria can operate outside the Council's surveillance. Seria confirms that Tjenemit, a Council member, has learned of the Void Zone and is being lured into Angrod's world via a summoning ritual orchestrated by the Meltheim and Tulhelm rebels. This god-level conflict, she explains, is set to happen on Angrod's world. The Meltheims, having ransacked entire cities for "fuel," are attempting to summon Tjenemit, unaware they are pawns in Seria's grand game. Angrod and Celes are now on a countdown, tasked with preparing for a war of gods that will inevitably cause immense destruction.

Angrod and Celes embark on a "camping trip" to a dungeon, disguised as a vacation for their friends. Angrod's true goal is to find a power core from a crashed flying fortress, hoping its "dragonbone" properties can enhance his organic enchantment. Their journey through the monster-infested dungeon showcases their contrasting combat styles: Celes's brutal, efficient martial arts and Angrod's calculated, magical precision. After defeating a dracogriff, Angrod absorbs its "dragonbone" scales, significantly boosting his physical capabilities. In a secluded moment by a waterfall, their long-simmering tension erupts into passionate intimacy. The encounter, fueled by their hormones and pheromones, leads to a startling revelation: Celes's dreams confirm Angrod's past identity as Johann, and her own as Sandra, his wife from a previous, peaceful mortal life. Their "hate-love" relationship is suddenly redefined by a deep, shared past.

Angrod and Celes, navigating the aftermath of their intimate encounter and the resurfacing of their past lives, attend Angrod's graduation party. There, Iris Tulhelm, whose father, Lord Tulhelm, was captured during the coronation battle, pleads for his release. Angrod, revealing his necromantic abilities, raises Lord Tulhelm's corpse, not to give him peace, but to place him under a permanent command spell. Tulhelm, now a conscious undead servant, is forced to obey Iris's every command, serving as her personal retainer and enduring a unique, unending punishment for his treachery. This act of "Mirai necromancy" showcases Angrod's cold, calculated approach to justice, transforming a mortal enemy into a tool and solidifying his image as a ruthless, yet pragmatic, ruler. Iris, initially shocked, quickly adapts to her father's new role, finding a twisted form of closure and control.

The time for Angrod's official coronation arrives, but the political stage is set for war. His uncle Seredorn and cousin Markorn, revealed as pawns of the Meltheim and Tulhelm rebellion, publicly challenge him. Angrod, having secretly siphoned vast mana from his fusion reactor, unleashes his full, devastating power. He teleports, instantly ripping out Seredorn's heart and then animating his corpse to sow chaos. He confronts Markorn, draining his mana and soul, a brutal display that cements his tyrannical image among the shaken nobility. As the hall descends into a bloody free-for-all, Angrod, severely wounded, claims his crown amidst the carnage. The true enemy, Lord Tulhelm (Iris's father), is captured but resurrected by Angrod as an undead servant for Iris, further cementing Angrod's ruthless, yet strategic, approach. The immediate threat is neutralized, but the larger conflict looms as Angrod and Celes prepare for the summoned Council member's arrival and the inevitable god-level war on their world.