Stockpiling for an Exiled General Through My Store's Back Door

After her maternal grandfather and grandmother passed away, Hua Buwan inherited the small supermarket they ran. She had planned to live a leisurely life, getting foot massages, enjoying the air conditioning, and watching cartoons while selling goods from the supermarket, but who would have known that the back door of her supermarket actually led to ancient times! She thought the tragically handsome man who appeared before her was just a cosplayer, but who would have known he was actually a General exiled a thousand years ago! He thought the female Shopkeeper of the grocery store who appeared before him was a mountain spirit or a demon, but who would have thought she was actually an educated university student from a thousand years in the future! By trading for his antiques, she rocketed to riches and reached the pinnacle of her life! By trading for supplies from her supermarket, he no longer had to worry about food and drink during his exile and even became a king who guarded a region! One day, the king disappeared for three days and three nights, and his people couldn't find him even after turning the world upside down. No one could have guessed that he had actually traveled to the world a thousand years in the future, with a certain female grocery Shopkeeper... One day, Hua Buwan disappeared for three days and three nights, and no one could find her even with satellite surveillance. No one could have guessed that she had actually gone to the ancient world of a thousand years ago, with a certain king...