Afterword was interesting.
. . . She thought this was shounen?!
It kind of makes sense, actually. Look at how many authors separate "yuri" from "lesbian", there seems to be an assumption that "yuri" doesn't only imply girl-girl romance, but something really idealized. If she saw her work as something more akin to Dowman Sayman's, which goes to unusual, serious, and often messy places with a hint of a science fiction riff to it, then I could see how she'd misclassify.