To put it simply, it is the story of a young girl who was tragically injured in a car accident and worked hard to resurrect.
To be more specific, it is a story in which the heroine is abducted by an alien creature called the Wish System and sent to the three thousand small worlds to work hard to complete tasks and change the tragic fate of the plot characters that suit the system's taste.
Essentially, it's a story of mutual rescue.