The premise follows Kyousuke discovering his sister Kirino's secret passion for anime and eroge (including little-sister themed adult games), leading to episodes about IRL meets, conventions like Summerket, novel writing, and cosplay, all resolved through personal relationships and hobby-sharing without any framing of systemic issues or identity politics. Casting uses standard Japanese voice actors (Yuichi Nakamura as Kyousuke, Ayana Taketatsu as Kirino) for Japanese high-school characters in a contemporary Japanese setting, with no race, gender, or sexuality alterations to established figures or foregrounded diversity mandates.

Creator intent and narrative focus remain on moe aesthetics, forbidden-romance tension within the family, and otaku normalization, as evidenced by episode synopses emphasizing game completion, friend groups like Kuroneko and Saori, and family dynamics rather than any activist messaging. Reception controversies center exclusively on the incestuous undertones and eroge content, not progressive themes.