Shizuri Ideura agrees to protect Tsukasa Atsumi in exchange for a place to stay. When Shizuri isn't on guard, she spends all her time playing video games.

The series follows Tsukasa, a normal salaryman who is attacked one night by demons, and is saved by a genius kunoichi named Shizuri. In her off time though, Shizuri is a lazy otaku NEET. Tsukasa and Shizuri end up living together, with Tsukasa using his homemaking skills to pamper Shizuri as she continues to serve as his bodyguard.—Anime News Network

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... A romantic comedy about living together with a genius Kunoichi who is an otaku and a NEET!.—Sentai Filmworks