[Machine Translation] Reincarnated into another world as a demon slaver, Tooru enslaves elves, female knights, demonesses, and his former classmate Kirika, and gains the trust of the princess who serves her, even turning dark elves into demon slaves. When Tooru proposes a sex match against Flamia, a demon girl who is sexually inexperienced, he gradually picks up his pace and once again confronts Flamia with Parmula and his friends--! Finally, he and Flamia, the predecessor of the great demon tribe Ivryth, come to an end - the fourth volume of this otherworldly reincarnation fantasy! (Special feature of the book version) Includes a newly drawn episode "Private Princess Knight Kindergarten".