Shin Megami Tensei IV: Demonic Gene

In the year 1492 of the Gregorian calendar, the Eastern Kingdom of Mikado stands as a realm defined by its rigid social order. The Samurai serve as steadfast protectors of the kingdom's populace, safeguarding both the privileged Luxurors and the common Casualries. Among these warriors is Walter, a fiercely independent fighter driven by a desire to refine his raw, self-taught combat abilities into true mastery. His reckless nature does not go unnoticed; fellow Samurai Gina watches over him with quiet concern, constantly wary of the dangers his untamed spirit might invite. Their lives are irrevocably altered during a routine night watch when the two are suddenly thrust into an entirely unknown world. Stripped of the familiar surroundings of Mikado, they are immediately confronted by a terrifying new reality: a tyrannical demon possessing strength far beyond anything they have ever faced. Forced into a desperate battle for survival against this overwhelming adversary, Walter and Gina find themselves pushed to their absolute limits. As they clash with this monstrous foe, the trajectory of their lives begins to shift dramatically, setting them on an unforeseen path that will forever change their fate.