Some say that being an adventurer doing quests for a living was a wonderful job because of the freedom and exploration that comes with the job. 
Unfortunately, that kind of life wasn't suited for everyone. A mage who found the life of an adventurer too difficult decides to retire and operate an alchemy store instead. 
He gains a bit of fame from running one of very few alchemy stores in the world, but things don't go too smoothly for him, as he is once again forced to go on adventures... 

* Novel also posted on webnovel, at https://www.webnovel.com/book/11168117505282705