This setup directly centers the narrative on rejecting rigid traditional family lineage demands in favor of personal romantic freedom, including same-sex relationships. Mei Kinosaki, a male crossdressing marriage swindler who presents femininely and is voiced by female actress Shion Wakayama, serves as Gero's primary partner and advisor, with multiple arcs and fan discussions highlighting ambiguous attraction, gender-nonconforming presentation, and potential queer romantic tension between the leads.

Director Motonobu Hori has stated that such diversity elements 'exist with the sensibility that if you’re going to make marriage your theme, this kind of diversity is simply a given' and are portrayed naturally without being treated as extraordinary. Audience reception shows clear division, with Reddit threads criticizing discomfort among shonen fans over the Gero-Kinosaki dynamic and the story 'challenging rigid straight romance expectations,' alongside praise for the inclusion. These elements extend beyond incidental diversity into foundational plot drivers and character dynamics, elevating the score despite the action-comedy framing.