WMG / Gal*Gun

The entire series is a prequel to the Azure Striker Gunvolt Series of all things.

Considering there is a certain level of things in Gal*Gun that appear in both it and Gunvolt, it's not impossible that the probability of the former being the past times of the latter being very plausible. The Kamizono twins Shinobu and Maya are actually Copen's ancestors, while Nori/Nowa (considering how she behaved when Mytyl/Michiru wanted to give her a charm and how she is referred by Xiao as The Courtesan Bewitcher, which makes it that her name Nori/Nowa is actually an alias) may either be somewhat related to Kurona or she actually IS Kurona, yet older, wiser and more mature (how she ended up as the Kamizono maid however is a mystery). This is further reinforced with the events from the Clockwork Daydream Drama CD where Lola/Roro (in her combat drone form) meets Kurona who gives her a pendant which she describes ""...An ancient item from the world of spirits".