A being that crosses dimensions and annihilates all life, ‘The Great Rift’.

And there was only one hero who managed to protect the world against such a Great Rift.

Hunter Kang Seo-jin, who drove back the Great Rift that tried to devour Earth and died in the process.

He was to proceed to the underworld for his next life’s reincarnation.

“I wish… if I’m reborn… I could try going to school just once.”

To grant the hero’s small wish, a reincarnation is executed by the underworld, but then…

“…What’s going on?”

The reincarnation… failed?

All the destinies that were supposed to meet me have… gone awry?

“From this moment forward, you are appointed as a ‘Underworld Agent’.”

To restore the twisted fates and properly fulfill the failed reincarnation. He must head to the school where all those he was destined to meet have gathered, the ‘Sanctia Academy’.

“Well. I guess I’ll be going to school after all.”

The 1.5th life of the former war hero ‘Lucius’ begins!