Houkai Sekai no Mahouzue Shokunin

When a global blackout wipes out electricity overnight, shut-in inventor Kenshi Oori finds his carefully isolated life in the mountains of Okutama turned upside down. A mechanical genius who prefers machines to people, Kenshi once made a quiet living crafting intricate devices and anime weapons from his workshop. But when a meteor crashes into his garden during the outage, he carves it into a wand just to pass the time—only to discover that the meteors which destroyed the world's power grids have unleashed something else entirely: magic.

As civilization collapses and chaos spreads, Kenshi's handmade wand might be the key to a new kind of power. Now this reluctant loner must step beyond the safety of his workshop and use his unusual talents to survive in a world where technology is gone and magic has taken its place.

(Source: Seven Seas Entertainment)