I Was Expelled from a Black Country, but I’m Not Worried at All Because I Have the “Fully Automated Hero Summoning” System.

Fray Lydia, the royal magician for the Kingdom of Chiral, was abruptly discharged from his position and banished from the kingdom one day. But because he is a descendant of the Great Wizard, he has the "Automatic Spirit Summoner" ability, which automatically summons the spirits of 1000 of the highest rannked heroes and heroines and has them solve various problems for him. Now reemployed with the Kingdom of Arcia, Fray decides to stop hiding his "Automatic Spirit Summoner" ability and begin using it. Through the concentrated power of the spirits, beasts are naturally exterminated, the nation's infrastructure is improved, education and training is taken care of. But shortly after Fray began exhibiting his immense power to solve the kingdom's biggest problems, Fray receives a message from the "Red Demon King" expressing his desire to meet him, even though he was thought to have been cast away several hundred years ago...?! It seems it all began with Fray's banishment... Source: Kodansha