different_minds

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.

Release That Succubus

"Are you going to teach me your dark magic?" Curiosity took the better of her as she finally couldn't stop herself from asking.

Zach already knew that it was a lost cause trying to explain that he wasn't a dark mage. He just shook his head in resignation and asked her to follow him knowing that he if he started to explain science and technology to her, she would brand that as dark magic as well. After all; humans had a history of branding and criticizing the unknown by giving them names like taboos, witchcraft, devil's work, demonic arts and dark magic not only in this new world but also in his previous world that was countless times more advanced than this world and where magic did not exist at all.

Reaching a clearing with a wider dimensions, Zach set up a target at the trunk of an especially wide tree trunk like he had done the first time he practiced with real guns when he came to the new world.

Chapter 57 A Seasoned Teacher