"Effeminate heroes! Giant fighting robots! Gravity-defying breasts!" It's easy to see the demographic AVD Films was aiming for with this advertisement. Zwei is the second second of Gravion, and in the same way Ikki Tousen is more about ample fan service than fighting, Gravion's robot action takes a back seat to the gratuitous breast-driven humor.
The series was released as 3 separate DVD volumes for $29.98 each. Volume 1 was also available with a collector's box, to store the upcoming releases, for $39.98.