The plot centers on the male scribe Enoch, guided by the male angel Lucifel and traditional archangels, hunting the Grigori fallen angels who descended due to love for humanity, created Nephilim hybrids, and accelerated forbidden evolution—prompting a potential divine flood that Enoch averts through combat and purification. Key characters include the human girl Nanna and her Nephilim companion Neph; all follow ancient religious source material with no gender swaps, sexuality changes, or modern identity elements. No character-creation systems, romance mechanics, pronoun options, or body-type customizations exist.

Developer statements from director Sawaki Takeyasu and Ignition Tokyo emphasize artistic freedom, watercolor aesthetics inspired by Studio Ghibli, and faithful biblical-mythological storytelling without any DEI mandates, consultancy involvement, or activist intent. Extensive searches for controversies, localization censorship, LGBTQ content, or developer activism yield zero results. Reception highlights its cult-classic status for visuals and atmosphere, with no critic-audience gaps or "woke" discourse. The premise, themes, and execution remain rooted in traditional religious narrative traditions focused on duty, judgment, and redemption.