Monster Factory - Chapter 645: I am a smart assistant.

Zach was a sci-fi game enthusiast who unintentionally crossed over to a magical isekai. Fortunately, he had access to the previous game system and could fight the magic-savvy aborigines with high-tech weapons.

“Magic? No, I have the lightsaber. ”

Unlike what he expected, the system presented him with a different way of leveling up. He had to get some kind of special energy from the pretty girls' bodies on this planet so that he could unlock his weapons.

“What the hell happened? Is my sperm capable of upgrading girls? Can my blood cause those girls to burst out instantly?”

This was incredible.

The succubi were a hated race in the magical isekai because they oversucked male sperm and killed men, but not Zach.

Surprisingly, the majority of the special energy that Zach required was distributed in succubi.

He appeared to be having a fantastic journey.

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The Demon King dies and the entire Demon Realm perishes in the prologue of “The Demon King is Dead,” and I have become the Demon Prince of that novel.

… Somebody save me.

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“I want to be a true demon.”

A boy not older than 20 years wished as he looked at the sky.

After suffering from the trauma for many years, he finally gave up on life.

People called him ugly, demon, and hideous.

He bared with it, but today he finally broke.

With a piercing pain in his chest, he died.

When opened his eyes, Logan found himself in another world and inside the body of a demon.

His wish was granted, but at what cost?

He had no power and was the lowest among the demons.

No one to help, no one to be with him.

But it did not affect Logan. Because he had something else with him.

‘Sin and Virtue System.’

Guiding him towards his goal to become a true Demon.

Logan’s conquest has begun, so be a part of it.

Otherwise, you will miss him.

The true Demon!

However, is the MC the 'only' one to have a system?

Hm?

Read the fucking novel and find out!

The youthful Qin Ye was born almost a century ago, but thanks to immortality granted to him by the ‘fungus of aeons’ he can pass for a high schooler.