Saki Ukai's Manga List

Kaito Sena's life hasn't exactly been easy. Unfortunately for him, death isn't about to get any better. Summoned by none other than Elisabeth Le Fanu, the "t*rture Princess," Kaito has to choose what he wants for his second life-be her butler, or die a long, painful death by t*rture. What is he to do but become her servant...and help her eliminate the fourteen ranked demons wreaking havoc in the world!
See the original light novel come to life in this gritty manga adaptation!

The near future. A terrible battle against a parasitic virus called "Gastrea" has been fought...and lost. Humanity is cornered and lives in despair. Rentaro and Enju face constant danger in their work as a team of specialists working for the Tendo Civil Security Agency, one of several groups dedicated to fighting Gastrea. Enju is one of the "cursed children," who survived the virus and gained superhuman powers as a result. A crazed top-hat-wearing terrorist is on the loose, but Rentaro's got his hands full just dealing with his fellow civsec agents!

I AM THE t*rture 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 t*rture 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 t*rtured 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 t*rture 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.

The World Has Already Ended.
The future--where a terrible battle against a parasitic virus called "Gastrea" has been fought...and lost. Humanity is cornered and lives in despair. Rentaro and Enju face constant danger in their work as a team of anti-Gastrea specialists known as "civil security officers." As if the daily fight against oblivion weren't enough, they'll soon face a threat that could destroy all of Tokyo...