In 2035, an incident known as “The Burst” occurs at a Japanese research facility, giving birth to the rapidly expanding, consuming, and self-replicating "Matter." Snaking its way through the remains of dams and military facilities in the Kurobe Gorge, the hostile Matter is besieged by task forces trying to prevent it from reaching the ocean and mercenaries seeking the truth behind its existence. Aiko Tachibana lives under constant medical surveillance after being rescued from the Matter. She spends her days waiting out her recovery by making paper planes. Soon, her daily life at school is disturbed by the arrival of transfer student Yuuya Kanzaki, who proceeds to point out a number of inconsistencies regarding her body. Why is she never injured, and why does she suddenly no longer need her wheelchair? He claims that there is more to her existence than she has been led to believe, and that she alone holds the key to ending The Burst. With many factions now interested in Aiko, she and Yuuya must gather allies and embark on a dangerous pilgrimage into the heart of the infested gorge before the net can close around them. To escape the conspiracy moving against them, the pair must face off against the Matter—an enemy that flows like water. [Written by MAL Rewrite]

In Universal Century 0088, the Anti-Earth Union Group (AEUG) has emerged victorious in its war with the Earth Federation's Titans at the cost of devastating losses. Neo-Zeon, the third faction in the war formerly known as Axis Zeon, remains as powerful as ever. Led by Newtype Haman Karn, Neo-Zeon has been implementing plans to take over both Earth and the space colonies. The AEUG flagship Argama heads to the Side 1 colony Shangri-La for repairs. Living in the colony is Judau Ashta, a 14-year-old junk dealer who is struggling to make enough money to put his younger sister through school. Upon the discovery of an escape pod containing a former Titans pilot, Judau and his friends are quickly led to the Argama in hopes of stealing a mobile suit which they can sell for a fortune. However, with the arrival of a Neo-Zeon ship seeking to defeat the Argama, Judau and his friends are dragged into to a conflict that will bring them across space and Earth. [Written by MAL Rewrite]

OVA episodes bundled with the 8th and 11th volumes of the manga.

Hino Akiharu lost his parents when he was small and was adopted into his uncle's family. He didn't want to be a burden on his uncle's family and decides to enter a free boarding school as a butler, Hakureiryou high school. However, his delinquent boy-like appearance frightens the girls, who make up the majority of the students. Unable to get along with the classmates, Akiharu meets his childhood crush Saikyou Tomomi.