Cautious Hero: The Hero Is Overpowered but Overly Cautious
慎重勇者 ～この勇者が俺TUEEEくせに慎重すぎる～ , Shinchou Yuusha: Kono Yuusha ga Ore Tsueee Kuse ni Shinchou Sugiru
Goddess Ristarte summons Seiya Ryuuguuin, an "overly cautious" hero, to save the world of Gaeabrande. Seiya is obsessed with muscle training and buying extra armor to deal with low level creatures. It's simply one cautious mission at a time for this hero!
