I've just finished watching Between the Sky and Sea, and the premise behind it is.... weird.
Ok so we have a world where all the fish have suddenly disappeared and the government's solution is to build fish tanks in space and train people to be space fishers and go into space and, er, go fishing.
The problem is that the fish are huge and very aggressive.
Space fishing is seen as a male only profession, but that's against the equality laws so...
Step forward our six cute girls who are training to be the first female space fishers. Oh, one more thing to be a space fisher you need to summon a 'Guardian Deity", which you do by using an ap on your smartphone.
This is one of those series that is so improbable that you have to keep watching just to see how it develops, and if you do stick around for the first two thirds of the series you will be rewarded by a story that gets better and more interesting in the final third. However, in my opinion they ruined the series with the final few scenes.
All the characters have interesting personalities and the six girls all have reasons why they want to become space fishers and those reasons and various problems they have are explored quite well during the series.
So overall, if you can get past the weird background of the story, it's a reasonably enjoyable 12 episodes.