ट्रिविया

Loosely based on the classic opera Der Ring Des Nibelungen by Richard Wagner.

The final scene in episode 6 features a cameo of the Yamato from the classic "Space Battleship Yamato" (Star Blazers) anime.

Takashi Toyama was originally going to play the role of Tochiro but had passed away so the role was switched to Koichi Yamadera.