The Achiga Girls' Academy in Nara once defeated regional mahjong powerhouse Bansei High School. It advanced into the national team semifinals but lost to the eventual champion, and the mahjong club was later disbanded.

Six years later, elementary school student Shizuno Takakamo befriends transfer student Nodoka Haramura. The two eventually enter Achiga Girls', but Nodoka transfers out of the school in the second year.

When Shizuno sees Nodoka on television the following year as the national middle school individual mahjong champion, she decides to revive Achiga's mahjong club.

The freshly debuted idol group Marginal#4 dreams of delivering their kisses to the end of the galaxy. Composed of Atom Kirihara, Rui Aiba, and the twins L and R Nomura, Marginal#4 aims to reach the top of the idol world, following in the footsteps of Pythagoras Productions' previous idol group, Lagrange Point. When they aren't performing, however, the boys of Marginal#4 are ordinary high school students. From securing a club room and chasing down missing underwear to filming commercials, their days are packed with various hijinks. As the boys navigate a flurry of events, they try to become shooting star sensations and charm the hearts of their fans, known as the Starclusters. [Written by MAL Rewrite]

Shortly after being rescued off the Himalayas, Federation Ensign Shiro Amada is accused of espionage due to his encounter with Zeon's top-secret mobile armor. Intelligence officer Alice Miller is assigned to investigate on Shiro's whereabouts during his disappearance. Her documented findings will determine whether or not Shiro is a traitor, and what his fate will be as commander of the 08th MS Team.

(Source: ANN)

One day, when Remu Mikage is on a video call with his sister, Shiki, who has traveled to the futuristic Okinotori-island Mega Float City for school, she confesses that both the audio and visuals of her are completely artificial. In order to be more efficient in her studies, Shiki has used neural-linked nanomachines to upload her consciousness onto a computer and is storing her physical body in a "body pool." While shocked, Remu is supportive of his sister's decision, until the disaster known as the "Early Rapture" happens. The Early Rapture causes everyone who has uploaded their consciousnesses to either fall into a coma or perish. Remu visits his sister's empty apartment one last time, but is shocked when Shiki arrives at the door. With no memory of her family or past, and being pursued by a violent group of researchers, Shiki and her brother are forced to flee using her newfound power of nanomachine manipulation.