A Relay Race. This part-fiction | part-reality story is not focused on completing a collective goal, but rather more heavy on passing off the baton to the next best available person whom they might or might not even know/seen/heard of. Complete faith in not just themselves, but also in strangers that in the rarest of probability 'might' be interested in taking their legacy forward. That's Orb and it's protagonists for you in a nutshell. Having just finished the anime adaptation too, I must say this is one of those very rare storytelling masterpieces that no matter in what medium; would excel in relaying what's supposed tobe relayed.

The art style might not be the very best, but that wouldn't even matter in the grandest scheme of things.
If you're someone who likes serious, grown up, thought provoking & tense (sometimes violent, sometimes emotional) plots, this is it. This is the Real Deal.