Amazing Twins
According to its Wikipedia entry, the creators are hoping this can be made into a TV series. After seeing it, I'd be okay with that. From what I saw, there's a pleasant mix of drama, superpowers, comedy, cuteness and wistfulness to the whole ordeal. I'd be able to get a little more invested in it than Tokyo ESP, and I don't even think Tokyo ESP is that bad. The standout part was the theme songs. The ED is cute, and the OP has this classic feeling to it that I find irresistible.
Knowing Ayame looks up to a toku/superhero show hooked me from the start. One thought couldn't help but to cross my mind. "Captain Japan" sort of exists already. Battle Fever J was originally supposed to be a Captain America spinoff, similar to the Toei version of Spider-Man (Marvel has a partial credit on both), but in preprod it was changed so the suits remained vaguely Captain America-ish and the team was international, but that's as far as it went. Battle Japan is as close to a real Captain Japan as the world can have.
And there's a bit of Kamen Rider too, of course. Ayame's ultimate form having a red scarf is the truest sign of Rider Spirits. Anyone can have them. I've actually been (half-seriously) throwing around the idea of Mari Okada writing a superhero show, and if it's not through Toei, let it be through this. I know I'd support it.