Probably one of the most confounding video games I've ever played, and I mean that in a good way. Not that it's particularly frustrating or convoluted, more like I'm baffled by its existence. It's a four disk large choose your own adventure anime with interstitial shmup segments. It takes a lot of obvious cues from classic tokusatsu and mecha shows, it also does not take itself particularly seriously. The anime segments also include commercial breaks for fake Geppy-X products (my favorites being the soy sauce flavored shampoo and chocolate salad dressing). Not to mention the all-star cast of anime vocalists and voice actors. Like... Hironobu Kageyama?!
The gameplay is alright, but it's clunky to say the least. Let's be honest, you're not playing this for the shmup part. The story changes in each route are small, but the game isn't particularly long so it's worth the extra playthroughs.