Cautious Hero: The Hero Is Overpowered but Overly Cautious (この勇者が俺TUEEEくせに慎重すぎる, Kono Yuusha ga Ore TUEEE Kuse ni Shinchou Sugiru) is a Japanese light novel series written by Light Tuchihi and illustrated by Saori Toyota. It began serialization online in June 2016 on the novel publishing website Kakuyomu. It was acquired by Kadokawa Shoten, who published the first volume in February 2017 under their Kadokawa Books imprint. The light novel series has been licensed in North America by Yen Press. A manga adaptation with art by Koyuki has been serialized in Fujimi Shobo's shōnen manga magazine Monthly Dragon Age since November 9, 2018. An anime television series adaptation by White Fox premiered on October 2, 2019.
The story begins when the goddess Ristarte summons a hero to help her in a hard mode video game-like world. The hero, Seiya Ryūgūin, is exceptional in every way, but he is incredibly cautious. He does things like buy three sets of armor (one to wear, a spare, and a spare for the spare) and go full power against weak slimes (just in case).