Crayon Shin-chan: Shin-chan's All-Purpose Craftsman Big Brother

[Rich Protagonist Transmigration + Slice-of-Life System + Cozy, Wacky Daily Life in the Original Setting + Heartwarming and Healing]

Tsukishima Yuma had hoped to steal a little leisure from life, but his quiet days were completely upended by the potato-headed kid next door.

"Big brother, fix Action Kamen's light sword, and I'll appoint you vice captain of the Justice Defense Force!"

Broken appliances, toys with snapped legs, battered old furniture... Yuma's joinery skills breathe new life into them all. Fixing appliances, dealing with tsundere neighbors, and healing the Defense Force, he gradually turns his little workshop, scented with cedar, into the warmest haven in all of Kasukabe.