The Marquis House’s Third Son Wants to Live Comfortably: Crafting Magical Tools in Another World with Knowledge from His Previous Life

Finn, who once lived surrounded by all the convenient home appliances of modern-day Japan, is reincarnated into another world as the third son of Marquis House Rosen.
This world has magic tools too — but somehow, their performance always feels like it’s missing something.
“I feel like life could be so much more convenient, so much more comfortable than this.”
Combining knowledge from his past life with the magic of this new world, Finn begins developing one household-enriching magic tool after another — air conditioners, freezers, hair dryers, and more.
The convenient magic tools Finn creates spread outward from the Marquis’s household to the kingdom at large, gradually transforming the daily lives of his family, the servants, and countless others into something a little more comfortable.
This isn’t a story about chasing after ultimate power.
This is a crafting-focused, slow-life isekai story about Finn, the third son of Marquis House Rosen — a young man in relentless pursuit of one thing: comfort.