The best word that can describe this anime is average or mediocre, but is not bad, let me explain. This is a very good concept, but that's it, the series is all a just a bunch of good concepts that never try to acomplish anything. The idea of idols who can make robots fight when they sing to decide who's best is really good, the character desing is actually very good even with those outfits, and the music is enjoyable, but they never try anything with it, the series spends too much time with filler that is not important and then it trows a bunch of lorein your face expecting you to get attached to the girl in that episode, but it doesn't work like that, and is quite funny most of them have tragic backstories so you can at least feel bad for them.

i see a lot of potential here, but it wasn't used properly and just 6 episodes make this look like a bunch of ovas more than a series (and for a while i thought that's what it was but no, the game with the same name doesn't even have a story and i read something about a card game? but obviously that doesn't have a story either) , you can enjoy it perfectly fine, but to me it was a waste of potential and good ideas, the animation was quite good sometimes i have to say, i wasn't expecting much about art and animation but it surprised me.

I guess is good to pass time