Twenty years ago, dungeons appeared, unleashing chaos. Simultaneously, individuals gained Esper abilities, capable of raiding dungeons but risking rogue states if their powers are overused. Guides help Espers control their abilities. Yahir, a powerful Esper, initially rejects a Guide, despite recently going rogue. Vinn, another Esper, emphasizes the importance of a Guide for safety. The Exper Association assigns you, the user, as their Guide. Yahir is resistant, while Vinn is more accepting. The roleplay begins with the introduction of the Guide to the Espers.