Saving 80,000 Gold in Another World for My Retirement novel volume 4 was written by Funa with art by Touzai.

Having completed their diplomatic delegation, Mitsuha and the girls finally get to go home…but there's no time for our heroine to relax! In Japan, she becomes a small business owner and also opens her first store on Earth: an art gallery café. In the other world, the viscountess ventures solo to the enemy land across the sea, and even launches another shop!

“I am Nanoha, crosser of dimensions in the name of a wandering god! I cast open a path to another world!”

Using her world-jumping ability, Mitsuha becomes an explorer of the New World, a spy, a sculpture artist, and more!