A "girl" named Sekai lost her memory due to some factors and came to the city called Suzuo. She met the famous local good man Qi Guansi, and the young master Oleks who left his hometown because of some unscrupulous things. In short, in order to help the three of Sekai, they formed an adventure team with the goal of tracing memories. So the three of them started planning a route based on the last place in Sekai's memory, trying to remind Sekai of the past by using places that may be familiar...
I haven't thought about the final ending yet, so I'll just write it down.
Intention: Memories