After finding a journal Izuku and Tsukauchi go to a castle searching for a safe space. Instead they find a way back. There they have to save not only their friends but their world.

The greatest enemy of humanity was sealed away. Hopefully for good. But in the centuries following their defeat a new unusual form of 'humans' appeared. But the world still needed heroes in the background. Namely those who keep their secrets and protect from the shadows. First crossover story so I hope people like it. Teen rating for language though it might cross into M sometimes.

During a battle between two seeker factions a teenager is sent into the world where seeker magic never existed. Instead there are heroes and villains who battle it out for control. His life tied to another's will change the fate of the world they have come to by mistake.