I love how in the last chapter’s comments, everyone forgot that gender neutral swimsuits exists, and by giving many of the boys obvious “tops”, this still manage to 100% leave Opera‘s gender impossible to place in the binary. :3
(You’ll still get some people claiming it’s “certainly“ one side or the other, but they won’t all be on the same side, only proving the uncertainty.)
As an NB person myself, I really like the efforts the author goes into to break the gender norms and normalize it. Like, the best one IMHO is having ALL devils, no matter their gender, wear nail polish. It’s subtle, but I keep seeing it, and it always makes me smile, like when Iruma, Purson, and Kalego all discussed about all wearing the same high quality black polish.