An average handyman named Saito finds himself transported to a new world, where he embarks on quests alongside warriors, wizards, and elves in mysterious dungeons. As he discovers the value of his skills in unlocking chests and repairing equipment, Saito experiences a newfound sense of purpose and belonging. Starting with a humble 'thank you,' this is the tale of an ordinary man finding fulfillment through his indispensable role in a fantastical realm.