Taichi Tanaka is just an ordinary 38-year-old who enjoys video games. He starts a new virtual reality multiplayer game called One More Free Life Online, naming his character Earth. Unlike his fellow players, he decides to master the most menial of skills in the game. He cooks the finest meals, overbrews complicated potions, and hunts monsters with handmade weapons. His fantasy life begins!

In order to protect an ordinary businessman, Tsukasa Atsumi, from demons, a genius kunoichi, Shizuri Ideura, signs a master-servant contract with him on the condition that she stays with him. Despite her cool appearance of defeating demons, Shizuri is an otaku NEET who spends all her time playing video games. While Shizuri is spoiled by Tsukasa and leads a lazy cohabitation life, the quirky Kunoichi gather together.