Retired S-Class Grocery Store

I, a former S-class adventurer, just want to open a cozy shop in a border town and live a stable life. The shop assistant who picked up the cat girl was always clumsy and knocked over the goods, but unexpectedly attracted the love of aristocratic customers. The elf slave whom he rescued casually became the chief mage of the town in an instant, and even came to visit him every day. Until one day, a former teammate came to the door and was horrified to find—— The person who showed me the store was actually the strongest dragon lady in the mainland, and the person who delivered the goods was the Holy Light Knight who was sought after by thousands of people. "Captain, the empire needs you!" I smiled and put up the "Closed Today" sign, "Sorry, our store is closed."