The narrative centers on the protagonist, Kaito Sena, a young man who dies in the modern world and is reincarnated in a fantasy realm. Unlike standard Isekai protagonists who are simply summoned as heroes, Kaito is summoned as a "Slave."
For this trope to work, the summoner cannot be a standard goody-two-shoes. He (or she) is typically a reincarnated salaryman, a betrayed hero, or a villainess who knows that the light refused her. demon maiden and slave summoning hot