Keishi Ayasato: 3 books

I AM THE TORTURE PRINCESS, ELISABETH LE FANU. I AM THE PROUD WOLF AND THE LOWLY SOW. A beautiful woman appears before Kaito Sena following his tragic death and rebirth into another world. Introducing herself as the Torture Princess, she orders him to become her loyal servant. Naturally,...

There are many foes that will succeed the "Emperor" and his contractor, Vlad. In preparation for future battles, Kaito begins to study magic. He even managed to defeat the Governor, but it was a trap. Vlad's old friend, Fiore, the Grand King, was able to sacrifice the soul of his brother and seal...

Kaito has had a rough life, but it only gets worse after he dies. When he's summoned to another world, he meets a beautiful and terrifying girl who offers him a choice-to be her servant and help her slay demons, or to suffer at her hands!