The Great Demon Lord and the Children of Olympus

(Tensura and Percy Jackson Crossover)
Ramiris and Veldora are up to their mischievous acts again, just to be stopped by Rimuru. The two have created another magic circle that connected to another world. Rimuru had decided to simply punish the two then forget about it but when Ciel shows interest in the world that was connected to the gate, Rimuru decides to leave the duo's punishment for later and lets them finish the gate... A very bad decision...

It has been a year since the Titan War, the summer that Percy and Annabeth had looked forward to was going great. That is until a strange circle was discovered right smack in the middle of the arena. As if the circle was not enough, campers started disappearing. They looked everywhere but found nothing. That is, until one week later when the circle started to glow. After the glow subsided, figures could be seen in the middle of the circle along with the missing campers. Except for Percy...