Looking for a reincarnation slave harem manga (found)

[thereaper8598]

I know that describes literally hundreds of manga, which is why I'm struggling to find it.
The story is an entire class was reincarnated into a fantasy world, and the MC gains the power to enslave others. In the first chapter one of his classmates gets sent to capture him and he enslaves her. As she spends time with him she learns how much his slaves love him. I remember it being lewd, but I don't remember if it had nudity. I also remember him wearing a hood, and one of his slaves was a girl with armor that looked like she was a robot (or possible a rock monster, but I'm fairly certain it was robot armor)

 

[undeed]

Himekishi ?
definitely nudity, don't remember about robot armor tho

 

[thereaper8598]

Himekishi ?
definitely nudity, don't remember about robot armor tho

Thank you, that's it. The character I was thinking of was Nana.