The year is 1931. The city is Shanghai. Ten years before America will enter World War II, the hydra's teeth planted by the first great global conflict are beginning to germinate. Hatching like spiders, they weave the complex web of plots and conspiracies destined to inevitably draw entire nations to the brink of destruction. Caught in the heart of these webs, desperately seeking to separate lies from truth, is Sakurai Kikan, an ultra-secret intelligence agency staffed by extraordinarily talented individuals with abilities far beyond those of normal humans. Their duty: to stop the darkest plots and eliminate the greatest threats. But in a city built on intrigue, can even a team of clairvoyants, telepaths and espers stand against the ultimate forces of destiny? (Source: Sentai Filmworks)

Once upon a time, the demon lord Rchimedes spread terror throughout the world, until he was eventually sealed away by the legendary hero Creasion. Since then, a thousand years have passed peacefully. However, a mysterious hole has opened up between the demon and human spheres, and countless demons have surged into the human realm once more. Coming to the conclusion that Rchimedes would soon return to wreak havoc, a human king summons the possible descendants of the legendary hero—all 75 of them. Unfortunately, after so long, it was too difficult to pinpoint his true descendants. Among the lionhearted prospects is the amateur adventurer Alba Frühling. His skills may not be top-notch, but he is accompanied by the talented soldier Ross, who helps the young hero whenever he is in a pinch...or at least, he is supposed to. Though undoubtedly a skilled warrior, Ross is actually both sarcastic and sadistic, and hence revels in Alba's suffering. Senyuu. is a comedic adventure following the unlikely duo as they struggle in their endeavor to defeat the demon lord, meeting various eccentrics along the way.

When humanity is driven to the brink of despair by an alien threat called Pillars, a self-proclaimed god named Odin appears and bestows upon the people the power of Valkyries—battle maidens who pilot vintage aircraft called Hero Wings. Claudia Schwertleite Bruford is the ace of the European Valkyrie Wing. When Japan's S-class Valkyrie passes away in battle, Claudia is relocated to Japan as a replacement. However, with a dark record of being the sole survivor in every mission that results in being nicknamed Grim Reaper, she suspects she already knows why she was chosen. Prepared to be shunned yet again, she arrives at the Tateyama Valkyrie Wing. Little does she know, her new comrades are a bunch of oddballs who have zero intention of accepting her dreadful nickname!

Unaired episodes of Senyuu. released with BD/DVD volumes. 1. Yuusha, Nagurareru. / Nise Panda no Seitai (Vol. 1) 2. Shitsujichou no Tabi Sono 1 (Vol. 2) 3. Shitsujichou no Tabi Sono 2 (Vol. 3) 4. Gakuen Senyuu.: Seishun Monogatari (Vol. 4)