This is practically canon. I agree it's surprising, since the original series is like a hentai/ecchi parody of some real series to begin with. I actually agree it does leave out some of the yuri, though. Hana eventually falls in love to the point where she becomes an action hero and rescues her queen. They should indeed do a mixture of what they're doing and more conventional romance.Most of the time when Ekaterina is disciplining Hana, it's because Hana has a tendency to top from the bottom otherwise. If that's not going on, Ekaterina is usually loving to Hana. Of course, she immediately, usually, rubs it in to Hana that she likes f_ing little girls and is a big pervert, but that's like snuggling in the afterglow by this point.