In the whole world there lay a mythical creatures which have their own ecosystem and can’t be considered part of the food chain. They also have supernatural powers and live together with humans. Ferry is one of the professional investigator, who researches the connection between the creatures and humans and is called a Genjuu Chousain (Mythical Beast Investigator). The story starts when a flying reptilian dragon (Wyvern) is attacking a village, and a Girl dispatch on the quest to research and investigate Wyvern and other mythical creatures.

(Source: MU)

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, his response is..."Hard pass." And so Elisabeth presents him with two choices-become her butler or be tortured to death. After rethinking his hasty decision, Kaito is forced to wait on Elisabeth hand and foot, as well as aid her in her mission as the Torture Princess, which is the subjugation of the fourteen ranked demons and their contractors. But there's a catch. Once her mission is complete, Elisabeth is fated to die alone-forsaken by heaven, earth, and all of creation.

Source: Yen Press

"I am 'Torturchen' Elisabeth Le Fanu, both a proud wolf and a lowly sow."

After dying, Sena Kaito was reborn in another world and confronted with a peerless beauty, Elisabeth, who had appeared before his eyes. Introducing herself as "Torturchen," she commanded Kaito to become her servant, but he refused on the spot. When Elisabeth presented Kaito with the choice of either torture or butler, he immediately submitted and began to serve at Elisabeth's side, to accompany her until she completed her mission. Unbelievably, it turned out that Torturchen's mission as a condemned sinner was to eliminate fourteen ranked demons and their contractors!

"Yes, indeed. I shall die, as lonely as a wolf and as pitifully as a sow."

Ayasato Keishi x Ukai Saki! This awesome partnership offers a masterpiece of dark fantasy set in another world! Here begins the legend of world salvation, undertaken by the maiden who had been condemned by the world.