Shin Megami Tensei IV - Demonic Gene summary: 1492 in the Gregorian calendar marked an era of peace in the Eastern Kingdom of Mikado, where the Luxurors lived lavishly while the underprivileged Casualries struggled to make ends meet in a caste-based society. The Mikado citadel was guarded against unwanted demons by samurai, comprising both classes. Walter, a hotheaded Casualry boy, and his friend Gina, a childhood acquaintance, were two of the fresh samurai recruits with complementing personalities - while Walter always found himself in trouble, Gina would bail him out. However, one dark evening, Gina arrived just in time to prevent Walter from seeking out a powerful demon, but their good fortune didn't last long. Ambushed by mysterious forces, they were transported to another realm, but managed to escape with minor injuries. Though Walter initially appeared fine, his health began to deteriorate. But, despite his unwell disposition, Walter was tasked with investigating the strange phenomenon of "literature," which infected people and transformed them into demons. As Walter became increasingly skeptical of his samurai responsibilities, his symptoms intensified. Finally, succumbing to the temptation of the forbidden "literature," Walter snuck into the Monastery's safe-keeping to read the confiscated book. As the pages unfolded before him, the very foundations of his home - the kingdom - started to crumble away.