Blood Shaper - Chapter 12Book 5:

“Mr. Kira, many people believe that the current dueling environment has become increasingly toxic, with dominant trends of heavy traps and defensive, closed-off playstyles. They say this unhealthy atmosphere was brought about by you, as the new generation's Duel King. What do you think about this?” a reporter asked during an interview.“Slander! Pure slander!”Kira was angered by this accusation.“Why say it was me who started this?”“Dueling has always been like this!”It's not his fault.Who let him play Yu-Gi-OH!

As if it wasn’t enough for me to be reincarnated as a child in the slums, I was taken to a city of crime and became a test subject. But then, when I saw the man that came to destroy the research institute, I realized that this was the world of an angst-filled reverse harem novel.

While living a relatively normal life after escaping from the institute, the heroine of the novel moved in next door. From the looks of it, I might be the heroine’s neighbor extra. Originally, the heroine was to save the unconscious and fatally wounded villain and in return, be subject to a fanatical obsession.

But, why. Why is the sub-villain collapsed in front of my house?

The sub-villain, Lakis Avalon, was the king of the underworld and the very same frightening man that I had met at the institute before.

“…”

I took a moment’s glance around then I kicked the man’s body away.

You’ve got the wrong house, Villain.

From humble beginnings, he ascended, overcoming every obstacle and living life on his own terms—until death took its toll. Yet destiny had a different design. Reborn into a world of greater splendor and majesty, he is granted a fresh start and boundless opportunities to rise again. This time, his journey begins from an entirely new vantage point, as he is reincarnated as the son of the most powerful woman in the universe. Follow his path of ambition and indulgence as he forges a new legacy and leaves his mark on an even grander stage.

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy