User Recommendations for Gargantia on the Verdurous Planet

I think Deca-Dence's twist and Gargantia's basic concept have more similarities than it may first seem like. At their core, both have a focus on a character trying to figure out their own issues by living in a world alien to their own, and getting inspired to gradually rise above themselves and the propaganda distilled in them. Both are also chiefly inspired by a girl who matters dearly to them. Deca-Dence is more about rising against the system whereas Gargantia is about protecting a new system from the old one, but both fight back against the world they were born into.