Well, it's hentai and you should not expect much of a story from such films as La Blue Girl 2. But for starters it involves a war between a Ninja-sex-clan and the demon clan who captures human women for power to open a gateway to the real world. I think La Blue Girl lacks organization and one can only pay attention to the massive amount of (very imaginative) animated sexual acts, not that it's bad. After all why watch it for anything else?
