Hain, a court instructor who has served the kingdom for a long time and sent out many excellent disciples, is expelled from the court due to the resentment of the first prince, Aidon. One day, Hain, who was working as an adventurer in a remote area where he was exiled, receives a request from Julius, the kingdom's foreign minister. The only thing the request states is [child guidance]. However, the children that Julius meets are all legendary races...!?