asuya

Roy died during a war against the Evil God Cult, but somehow, he returned back in time to 30 years in the past where he was just a boy who awaken his summoning magic. 
Just a few days before his death, he became the only Aura user in a world of magic. 
Using his knowledge and experience, he will become an Aura user again, faster than his previous life. 
Accompanied with a shape-shifting black slime, he will make sure to protect everyone he cares about and win against the Evil God Cult.

The Only Aura User In Magic World

"We were sure that this city is safe from the cult as we have investigated it for a while. But it seems like we were wrong. I'm sorry for our failure in checking everything."

The one who said that was an agent who was the leader of the investigation team in this city. Just an expert level mage.

He apologized because he and his team failed to find any clue about the cult. They thought that this city is safe. But turns out, they were wrong. As a teacher is now threatening the mother of one of the royal palace's maids with the lives of the students. While the students themselves didn't realize that their lives were being targeted.

If it's just being targeted, then it's fine. But if that teacher turned out to have spreading the cult's teachings to them, then we might have to face more enemies than expected.

Two Master Level Mages at the School