Start in DxD as Motohama: Leveling Up in Another World - Chapter 21: New Class

After Amihan, politician by day and otaku by night, died from a political assassination, she got transmigrated as the saintess in another world. But she always felt like a fraud. Why? If she was the chosen one, why did she feel so rotten inside?Also, wasn't she atheist?However, her years of forced piety and suppressed desires ended in spectacular failure - her decapitation.Three days later, she woke to the sight of a worshiper bowing low. “Welcome back, O Sun Who Burns The World,” they said.'Wait. What? I'm not the Saintess? I was this all along?'Furious at the wasted years of celibacy, moral dilemmas, and suffocating oaths, Serafine made a vow: no more pretending. No more rules. The world? Hers to ruin. The people? Playthings.But wait. It was harder than she thought because...How in the name of the Goddess Aurelia was she supposed to have her debut when she was surrounded by a bunch of suspicious and crazy beautiful women who wants to hunt her down?!This was no different from her previous world!

The day a mysterious darkness enshrouded the world. It was theorized that the earth’s magnetic field had been changed, the data that corresponded to it also changed. The previous academic knowledge had been overturned, and numerous things had to be re-explored.

The science that humanity was familiar with had been disrupted, including the genes of human beings. One of the largest disasters brought by the change was that 80% of humanity transformed into zombies. After years of struggling, a few lucky survivors would evolve and awaken a power inside themselves. Chu Han was never that lucky.

While holding on against the first wave, humans weren’t the only ones getting stronger. Soon, stage 1 zombies evolved into stage 2 then 3 and so on. 10 years after the mysterious meltdown, the world of man belonged to the zombies. Humanity was nearing the of the end of the eschatology.

One day, Chu Han consciousness came back ten years before the end of the world came. He was awakened by a loud noise in a dormitory in Minqiu University. With only 1 day to prepare before the meltdown begins, he slowly begins to realised that he had undergone a rebirth. A power was awaking inside of him now despite never appearing in the hellish future. It calls itself the meltdown system.

Despite losing the monstrous strength gained through years of harsh training, this system claims to trade kills for talents. This is a story of a collapsing world, a meltdown system, and Chu Han being on stage as he travels to save those he could not save before.

- Description from Novelupdates

In the 41st millennium, darkness rages across the galaxy!The Imperium of Man has lost half of its territories.Millions of planets have fallen victim to the invasion of Chaos!Famine, crime, and heretical cults spread like wildfire…On the planet of Urth, located in the Imperium's dark zone, extreme suffering is taking place.Fortunately, the savior, Eden, has arrived!He awakens to the essence of the Warp and leads his people to prosperity!Starting from a small, broken territory:Farming, building armies, managing internal affairs, unifying the planet, creating Space Marines, forming a fleet, embarking on a grand expedition...When the Lord Regent leads the Imperial fleet to reclaim lost lands, he gazes upon the flourishing star systems and the sky-darkening armada, then looks back at his own ragged ships and is left dumbfounded...Who is the true Imperium?[Raw: 官场职场 > 战锤：从行星总督开始]

In a world fractured by conflict and haunted by shadows of the past, Kokushibo—the first Upper Moon demon—meets his end, only to awaken in a new life. Reincarnated as Crimson, a child born into a different family, he carries the memories of a past he cannot escape. Burdened by centuries of guilt yet indifferent to the present, he resigns himself to duty—until an unexpected bond with his newfound family begins to thaw his hardened heart. As he struggles between the weight of his past and the weight of the new life, Crimson must decide whether he will remain shackled to his former sins or embrace the possibility of peace.