Taboo Conquest of Lustful Emperor - Chapter 190 - 153

In the year 2220, a radiation source in the Pacific Ocean, tens of thousands of times stronger than a nuclear bomb has begun mutating exposed creatures into horrific monsters thousands of meters long. Mankind’s only hope was nuclear weapons, which only made matters worse. The combination of the natural radiation and nuclear radiation released an incurable and highly infectious virus, turning the 90% of the world’s population into violent zombies in mere weeks.

Korean entertainment novels, I don’t like it.

There are already three copies, character protection, never TJ.

- Description from novelbuddy

Shiro Sakamaki was reborn into a new world with one simple goal: to live a peaceful, luxurious life free from drama.But when he transfers to a prestigious high school in Tokyo, he quickly discovers that his new reality is anything but ordinary. The city is a strange mix of supernatural forces, ghostly phenomena, and events that feel like they’ve jumped straight out of an anime.Before long, bizarre occurrences follow him everywhere, along with a series of beautiful, mysterious girls—from the arrogant, blonde twin-tailed exorcist, to the mysterious quintuplet sisters, to a passerby heroine with hidden powers.As Shiro gets tangled in the supernatural chaos, he realizes he’s at the center of something far darker. Cursed relics begin to surface, and Ancient, Evil Outer Gods—whose very presence bends reality—start to stir.Now, Shiro must figure out why he’s caught in this web of strange occurrences while trying to survive school and the surreal new world he’s been thrust into.

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?

- Description from Novelupdates