[Demon Slayer] The Wizard Genya After Being Reborn in the Taisho Era

After Genya dies in the final battle at Infinity Castle, he transmigrates to Frieren's world. He is told that if he can imagine a kind of magic, then one day he will return to his original world and reunite with his family. So Genya studies magic hard, and during one mission he transmigrates back to the point in time before any of the tragedies had happened.

Genya declares: This time, I will make sure everyone in the Demon Slayer Corps is safe and sound when they watch Muzan die! No one will die in front of me!

(No couples, no breaking up ObaMitsu, platonic relationships among the whole cast. The world of Frieren is just here to give Genya some power-ups; maybe the girls will have a chance to appear.)

Genya is better at attack magic, not very good at healing, and has no talent as a warrior. But he can be like that monster who fought the mage disguised as a close-combat fighter and sparred with Stark, acting as a close-combat mage.

I'll do my best to keep everyone in character.