I was going to say this if you didn't. But I want to comment that it being attached to Yabuchi-sensei would only get its foot in the door. I think it's also doing well because it's damn good and eating up a lot of the entrees that most gender bending plots leave on the table (i.e. a great deal of focus on social role shifts, how sad it is we put up empathy walls based on gender, character dynamics brought about by both etc). It turns out Yabuchi-sensei is one of the greats for a reason. It's like she took some of the best parts of Onimai, Ayakashi Triangle and her own catalogue and made it an all-ages shoujo manga of it. I highly recommend it.
Compare "Watashi no Hatsukoi wa Hazukashisugite Darenimo Ienai" which also has a great pedigree, written by the Oreimo/Eromanga-sensei author Fushimi-sensei. It got pretty hyped when it was first announced I believe. But the actual content? It's... it's not good. It has very few unique ideas of its own and what well worn gender bend tropes it does use, it uses as clumsily as possible. To be honest it even has a reek of cynicism, to the point I wonder if the author actually likes gender subversion or is just prodding the genre with a stick. As quickly as it initially came onto radars because of Fushimi-sensei, it's dropped off them since.
