To be fair, the yuri content in the game seems to be pretty low. Not really a loss...
Sure the game doesn't has the high octane yuri of the anime but is still pretty damn yuri on its own, specially for a mainstream product. Ranka is one of the biggest (if no the biggest) siscon in media, you have honest to god kisses and while you can pair all the girls with each other that is just a gameplay convenience; the narrative actually bothers on develop specific pairings (Rinka/Ranka, Viola/Koharu, Momo/Mana)