I was an isekai hero, summoned to a new world and tasked with a destiny to defeat the Demon Lord. For over a year, I fought, grew, and fell deeply in love with Aria, the Princess of Elyria, who stood by my side through every trial. We promised a future together, a life built on peace and our shared devotion. But victory brought not joy, but a cruel betrayal. Fearing my power, the crown prince orchestrated my execution; I was accused, condemned, and beheaded, my last sight the desperate, tear-streaked face of Aria, held back as she screamed my name. Was everything I sacrificed truly for nothing? Then, I awoke. Not to oblivion, but to an unholy second chance. A crimson gem pulsed in my chest, a demonic artifact keeping me anchored to this world, resurrected as an undead being fueled by an amplified thirst for vengeance. The demons who resurrected me sought to control me, but I found my own purpose: retribution. I march now towards the capital, a monster returning to settle old debts. Yet, as I near the familiar gates, she awaits—Aria. My beloved, the Saintess, standing as the ultimate obstacle. Her eyes betray a mix of sorrow and hope, a desperate resolve to prevent the monster they made of me from sullying its hands any further. The hero she knew is gone, replaced by a specter of hate, and now, my path to revenge demands a confrontation with the only person I never wished to harm.