The core premise and plot drivers remain traditional sci-fi dystopia elements focused on survival, escape, and societal secrets, as detailed in episode synopses involving dead bodies, rescues, and Holy Day attacks. Thematic centrality of progressive messaging arises from the prominent central m/m romance between Shion and Nezumi, confirmed as an official couple through multiple kisses in episodes 7 and 11, declarations of romantic feelings, and protective intimacy that forms a major recurring theme and character motivation. This LGBTQ+ representation is integrated as a focal character arc rather than incidental, with the pair's bond driving key decisions like Shion's defiance and Nezumi's emotional shifts while subverting some tropes like bury your gays. Creator intent appears in the choice to place the romance in an action-dystopia framework without yaoi labeling, and audience reception shows 2011-era backlash to the explicit same-sex kiss and relationship from portions of the audience alongside praise for the integration.