Episode titles such as 'The Kiss,' 'Friends,' and 'As I Am,' combined with key art depicting the pair in an intimate hand-holding pose and plot points involving shared secrets, healing kisses, and reaffirming their bond, establish the yuri romance as the primary emotional driver. The manga originated in Comic Yuri Hime and is explicitly marketed as yuri dark fantasy, with the title itself foregrounding the desire to 'love you till your dying day.' This places queer female romance at the foundational level of the storytelling, meeting the criteria for heavy progressive ideological embedding through prominent non-traditional identity representation used as a focal point.

While the war orphanage setting provides a fantasy backdrop, the narrative repeatedly returns to the girls' intimacy and emotional connection as the core appeal, with no evidence of organic incidental diversity or traditional storytelling tropes overriding the activist-adjacent emphasis on LGBTQ+ relationships. Audience and critic discussions consistently highlight the sapphic yearning and yuri elements as defining features rather than side aspects. Creator statements and production materials reinforce the intent to explore this dynamic in a supernatural yuri context, with no offsetting traditional or neutral framing to dilute the centrality.