I have to point out this is canon. Not the doujin itself, but the title. Yoko Hikasa (Maria's VA) confirmed in a interview that Maria is interested in Tsubasa and is annoyed that the latter won't touch her.

As a big Symphogear fan and Maria x Tsubasa shipper I feel so blue balled right now xD

I have to point out this is canon. Not the doujin itself, but the title. Yoko Hikasa (Maria's VA) confirmed in a interview that Maria is interested in Tsubasa and is annoyed that the latter won't touch her.

Well, of course she won't. Maria isn't Chris, and Tsubasa isn't a cheater. ;)