Quick Transmigration, Rescue Some Books!!

A quick transmigration story where the protagonist's spirit is damaged. In every life, they start as a child and live to a natural death. There is no romantic pairing, and their mind is not fully intact either. In the previous modern setting, they were an assistant teacher at a special school. In the next ancient setting, they accidentally say that they are a child of the stars, and their mother believes they are a celestial child.