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

"The end of Windsor family would mean the end of their lives as well. We have to be responsible for them too because they have supported us all this time. Therefore, the choice between me and our father isn't a choice at all. You know that as well."

Clara nodded vigorously as if she had carved every one of her sister's words into her heart and would follow those instructions to her death. She would make it her lifelong creed and would become strong enough to make similar sacrifices for the family if the time ever came.

The two sisters held each other close and comforted each other while the others retreated to the edge of the room unwilling to disturb the two sisters.

Chapter 166 A Belated Explanation