The premise centers on Lily, a mute amnesiac clone of the White Priestess Fretia, who purifies blighted knights (such as the Umbral Knight/Ferin, Siegrid, Gerrod, and Julius) to recruit them as spirit allies while unraveling the Rain of Death curse through ancient pacts, sacrifice, and bloodline lore. Backstories feature traditional heterosexual relationships and tragic heroism with no modern framing.

No character creation, romance systems, pronoun options, or identity exploration exist. The Umbral Knight receives neutral gender references consistent with its spirit nature, never positioned as a statement. Developer and publisher materials emphasize atmospheric storytelling, Mili soundtrack, and combat without any DEI, consultancy, or activist intent noted across sources.