The main line of the story is about a senior sister who is extremely trivial, lazy, greedy and has no money. Before setting out to avenge her junior brother, she did not forget to cook a meal and arrange the chickens and ducks at home. She accidentally became a female devil in the martial arts world.
There is no time travel, no rebirth, and it is also martial arts.
Yes, you read that right, it is a quiet story.