In Kuroko no Basuke (the original show), Kuroko is a boy, so yes this doujin is considered as a gender bender one... If you don't believe me, just google "Kuroko Testuya" and see by yourself.
I get that the character is normally male, but this feels like an MLP fanfic-level cop out here.
Also, why just throw us into the action? I get wanting to get to the SexyTimes® quickly, but honestly, the SexyTimes® feel more valuable when you build up to them, and develop your characters a bit more.
Base +5, fine17 -6, Pliny the Younger +6, Chloral -4