First male character who's definitely 100% gay and knows about it?
I think that could be accomplished without such a tedious character introduced purely for drama. Even the author points how them looking identical is a cheap coincidence.Someone pointed out that this 'double' arc is important for hanae and mei relationship because they only like each other as girls, so this new character could nudge their relationship to the truth because he loves hanae as girl and guy, which mei still troubled to like the latter. I hope the resolves will be satisfying!!
i feel like itd be odd if shuumei doesnt realize its not hanae that hes interacting with. because hes met hanae as mei and knows roughly what kind of person he is. also isnt mei still under the impression of hana being hanae's sister? so itd definitely make this fake hanae's motives incredibly questionable. addtionally, fake hanae has already said hes not related to hana. although shuumei is insanely dense so he probably wouldnt put that all together...And now Mei is going to think Kanae is Hanae lmao. Pure confusion, great stuff
Though as others have said, I'm also worried about Hana being forcibly outed here. Hope the hijinks can save her from that. I get the conclusion of this manga is that Mei and Hana come out to each other, but it'd make me sad if they can't do that under their own terms.