Isekai (Reincarnated into Another World)

Beneath the bustling streets of the prosperous city lies the Undercity, where a secret resistance movement plots in the shadows, holding on to the fading memories of their former hero. In this dark and hidden realm, they gather in secret chambers, strategizing against oppressive forces while echoing tales of bravery and sacrifice.

Gloomy passageways illuminated by flickering torches, with makeshift meeting rooms adorned with faded banners of a bygone hero, and the sound of whispered conversations echoing off damp stone walls.