Clockwork Planet (2017)

S1E6 Deep Underground

Marie and Naoto stumble upon AnchoR in the depths of the Mie Grid, but she appears vastly different from what they anticipated. As they engage in battle with the armed AnchoR, both Naoto and RyuZU plummet into the dark abyss below. To add to Marie's distress, they discover the looming threat of a colossal weapon lurking in the shadows...