The plot repeatedly returns to intimate scenes, jealousy-driven conflicts, blackmail over their encounters, and Yuzu's discovery of same-sex feelings after Mei takes her first kiss on their initial night sharing a room. Subplots such as Christmas blackmail and field-trip confessions all revolve around the stepsister dynamic and lesbian identity, making this queer romance the indispensable emotional engine of the series. Creator Saburouta explicitly frames the story around same-sex attraction drawn from personal experience and serializes it in Comic Yuri Hime, a magazine dedicated to yuri themes.

This intent elevates identity exploration from incidental detail to the central conflict, turning the stepsister premise into a vehicle for foregrounding lesbian relationships rather than organic storytelling. Reception underscores the work's intense focus on lesbian themes while noting controversy over non-consensual elements and pseudo-incest, signals that the progressive messaging dominates audience discussion and often overshadows entertainment value. The result is a series whose core appeal rests on ideological framing that compromises broader narrative coherence.