Atomic;Genesis: The Atom of Genesis

Atomic;Genesis: The Atom of Genesis is a major story arc introducing the early DEAD IMMORTALs and following the relationship of Yuusha and Rias Grigori of the Grigori Clan.

Introduction
Thousands of years ago in the world of EXTERIOR, there existed a timeless feud between the ASGUARDIANS and the DEAD IMMORTALS. This feud had been ongoing since the beginnings of time and would seem to last until the ends of time, if it not for one hero and the most unlikely of princesses...

Characters

 * Yuusha
 * Rias Grigori - the 13th Watcher, a DEAD IMMORTAL, and the current MAEO LORD.
 * ARIERU - Yuusha's mentor.
 * Fianna - A female knight and former companion of Yuusha.
 * Scathach - Fianna's mentor.
 * Fennel - A female wizard.

Locations and Terminology

 * EXTERIOR - The plane that the story takes place in.
 * ASGUARDIANS - Humans of EXTERIOR.
 * Elder Kingdom - Kingdoms belonging to the ASGUARDIANS. They are located north of the MAEO GATE.
 * Vajar - The most southern Elder Kingdom.
 * UBAR - The most southern ASGUARDIAN city belonging to the kingdom of Vajar.
 * Giralda - A northern kingdom allied with Vajar.
 * UBAR - The most southern ASGUARDIAN city belonging to Vajar.
 * MAEO GATE/OTHER SIDE OF THE HILL - A small area with a giant castle between the Elder Kingdoms and ISFAHAN. It is controlled by the MAEO LORD.
 * ISFAHAN - A land located south of the MAEO GATE. It is the home of the DEAD IMMORTALS.
 * PSALM - System level built-in functions.
 * PSALM OF PROMISE
 * Sabrac, the Blade of Grand Order - A Legendary Blade given to Yuusha by ARIERU.
 * ETERNITY VAULT
 * Blue Tears - A set of swords belonging to Fianna.
 * Flame of Life

Titles

 * MAEO LORD - Title belonging to the 13th Watcher and ruler of the MAEO GATE.
 * 13th Watcher
 * Hero of Heroes
 * White Swordsman
 * Scholar of the Roses
 * Knight of the Demon Flash
 * Berserker Princess
 * Whimsical Ancestor