Fans of yuri visual novels may be aware of the upcoming release of The Waters Above from Studio Élan. That game may still be a ways out, but you can dive into its world and get to know its characters now.
The Waters Above: Prelude is a short prequel to the main game. All main characters get their chance in the spotlight across four chapters. Sea nymphs, who care for the stars in the sky of a domed world, depend on magic. The story begins as magic begins to fade from the world.
Anyone can check out The Waters Above: Prelude for free on Steam. It runs on Windows, Mac and Linux.