Well, first time I've tried to translate anything on danbooru. Fairly sure I've got the first panel right, but the first kanji on the 3rd panel has me stumped as to what it is, so I'm a bit stuck for now.

Are you talking about the left or right speech bubble in that panel? I'm pretty sure the word in the left one is 高校 (high school, so presumably where she played basketball previously), and the one in the right is 幻想郷 (which is, of course, Gensoukyou).

Since this was undeleted for being part of the basketball series, can someone translate this?

I can say the art for this series really improved.

Could somebody translate the other pages? It seems really a interesting doujin.