Shin Izayoi

The only fool of the Odd Squad throughout the centuries...
The Monarch and the creator of the Serial Designation army...
The master of the angel queen Raphael....
The strongest one possessing the ability to manipulate the concept of boundaries...
And the traitor of the cursed clan....
One day, while cleaning the house, he unexpectedly discovered an old notebook in his attic. After reading it for a while, he realized that this was the diary of someone who claimed to be the Arbiter. In the notebook, there was mention of an event that would lead to the extinction of humanity. To prevent this from happening, he decided to embark on a journey to another world known as the Celestial Realm, while also seeking answers about the identity of this mysterious figure.