Mad Esekai:Summoning fail wrong hero summoned

Irah, a hardworking university student, discovers a magical crystal ball in his family's haunted village house. The ball grants him weapons, powers, and reveals that a fairy summoning ritual accidentally connected his house gate to another world. Joined by the knight Shumi, the assassin Liza, and the dragon Blez, Irah battles demons, masters magic, explores a fantasy world, and grows stronger to protect both worlds from an approaching evil.