Nuclear-powered Sword Immortal - Chapter 799 - 686 Self-directed and self-performed_4

[Warning: Mature content, R18, Harem, Monster Girls, No NTR, No Rape ]He was a prostitute who had a simple dream. Living in peace, going to college and getting a good job like an average man of his age. But when he decided to leave his old life behind and pursue his dream, he was killed by demons.But he got a second chance as a dragon king in a different world. A world filled with monsters and strange tribes that he had never seen before. As the protector of that foreign world, he tried his best to regain his power before the other tribes realized it. Then ... he discovered the secret of the Dragon King's power was he must build a harem ...

After you’re awake but find yourself looking like a character in a game and came to a strange place, is this a different world or a game? Is it a rebirth or a cross over to another world? Everything needs to be explored by yourself!

- Description from Novelupdates

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?

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.