Yuuya Tenjou is a young man who has experienced bullying throughout his life. He resides with his cherished grandfather while attending school. Despite facing harsh treatment at school, he decides to take some time off to recover from his injuries. During his absence, he takes advantage of his time at home to clean his grandfather's house and explore a room he had never visited before. In this room, he discovers various items that his grandfather had collected from his travels around the world. While arranging these items, he comes across a door that is not on a wall. Intrigued by this discovery, he opens it and finds something on the other side that is unexpected.
Isekai de Cheat Skill wo Te ni Shita Ore wa, Genjitsu Sekai wo mo Musou Suru: Level Up wa Jinsei wo Kaeta has been published in English as I Got a Cheat Skill in Another World and Became Unrivaled in The Real World, Too by Yen Press under the Yen On imprint since May 17, 2022.