High above the realm of man, the gods of the world have convened to decide on a single matter: the continued existence of mankind. Under the head of Zeus, the deities of Ancient Greece, Norse mythology, and Hinduism, among others, call assembly every one thousand years to decide the fate of humanity. Because of their unrelenting abuse toward each other and the planet, this time the gods vote unanimously in favor of ending the human race. But before the mandate passes, Brunhild, one of the 13 demigod Valkyries, puts forth an alternate proposal: rather than anticlimactically annihilating mankind, why not give them a fighting chance and enact Ragnarök, a one-on-one showdown between man and god? Spurred on by the audacity of the challenge, the divine council quickly accepts, fully confident that this contest will display the utter might of the gods. To stand a chance against the mighty heavens, Brunhild will need to assemble history's greatest individuals, otherwise the death knell will surely be sounded for mankind.

Manabi Straight! follows the lives of a group of young high school girls living in the year 2035 while they attend the all-girl Seioh Private High School. Since the birth rate has dropped dramatically, schools are being closed down due to the sheer lack of students available to teach. Morale in schools has dropped dramatically, and Seioh is no exception. The story begins when the main character, Manami Amamiya, transfers to Seioh. After some initial hijinks involving a futuristic scooter and a swim meet, followed by an inspirational school song performance, she is inducted as the student council president. The story that follows pertains to Manami working with Mika Inamori, the only other student council member, and three other classmates named Mutsuki Uehara, Mei Etoh, and Momoha Odori, in student council matters. After some remodeling of the student council room, Manami and her friends set forth to plan for the upcoming student festival. (Source: Wikipedia, edited)

Mylene Hoffman, a beautiful cyborg spy with the codename "009-1" lives in an alternative world where the cold war never ended, continuously on-going for 140 years. The world is split into two factions, the West and the East block. A masquerade of peace between the two is slowly dissipated as the conflict occurs. Through politics, the two factions battle over supremacy over technology to threats of a nuclear attack. Mylene Hoffman, teaming up with three other agent, gets surrounded by deception, chaos and rivalry as she carries out missions assigned by her superiors. [Written by MAL Rewrite]

Sasha is partnered with Hana as his new Maria. They infiltrate an all-girls academy, forcing Sasha to crossdress, in search of a Qwaser-related artifact called the Magdalena of Thunder which has appeared in one of the students. However, they have some competition in their search of it. (Source: ANN)