After overworking in a toxic corporate world, Yuuji Sano finds himself in a game-like fantasy realm for a fresh start. Despite his desire for a quiet existence, he discovers his innate talent as a Monster Tamer, the lowest adventurer rank. Yuuji befriends and harnesses the power of various slimes, evolving into a powerful Sage. Despite his immense strength, his past traumas hinder him from fully embracing his abilities. Yet, as ominous threats loom, Yuuji must confront his hidden powers to protect his newfound world from impending doom.