Benriya Saitou-san, Isekai ni Iku

便利屋斎藤さん、異世界に行く / Handyman Saitou in Another World / Handyman Saitou–san Goes To Another World

Handyman Saitou has never been anyone special. All his life, he's had average grades, ordinary athletic skill, a commonplace job... But his unremarkable path takes a turn when he wakes up in another world. Here, warriors, wizards, and elves accompany him on quests delving deep into dungeons, and Saitou realizes for the first time what it's like to be needed. After all, who other than the handyman could be trusted to open locked treasure chests or repair his allies' equipment?