is a Japanese light novel series written by Ryouta Hori and illustrated by bob. It began serialization online in 2009 on the user-generated novel publishing website Shōsetsuka ni Narō. It was acquired by Hobby Japan, who published the first light novel volume in October 2015 under their HJ Novels imprint. A manga adaptation with art by Yukari Yagi has been serialized online via Hobby Japan's Comic Fire website since 2016. Both the light novel and manga have been licensed in North America by J-Novel Club.
Plot A high school martial artist named Ryoma Mikoshiba is summoned to another world by the warmongering O'ltormea Empire, which regularly summons people and enslaves them with mind control and abuse, ruthlessly discarding anyone who is weak. In this world, whenever someone kills another, the life force of the victim is absorbed, making the killer stronger. Sensing that the royal court that summoned him is malevolent, he fights his way out. During his escape, he rescues the twin girls Sara and Laura from slavery and they pledge loyalty to him. He starts building his own nation to fight against tyranny.
Media Light novels Hobby Japan published the first light novel volume in print with illustrations by bob in September 2015. As of February 2026, thirty-two volumes have been published. The light novel is licensed in North America by J-Novel Club.
Volumes
Manga The light novel series was adapted into a manga series by Yukari Yagi and published by Hobby Japan. As of December 2021, the individual chapters have been collected into twelve tankōbon volumes. The manga is also licensed by J-Novel Club.
Volumes
References
External links at Shōsetsuka ni Narō