Submarine 707 v2
OctonionicOur story continues. There are midseason upgrades all around, a few more characters get names, and the Americans show up. Ozawa also starts regular sidebars describing (then-current) submarine technology. The submarines continue to be the star of the show, of course.
The plot will finish up sometime in the next volume, at which point a new story will begin, which has been adapted into one of the OVAs.
Volume 2