De:vadasy

For young men like Kei, life is still plagued by nothing but homework and girl trouble. When an unknown force besieges Earth with robotic war machines, however, it is Kei who is chosen to defend the human race.

Guardian Hearts

Maya, Kurusu, and Chelsea hit it off really well when trying to get revenge on Guardian Hearts for making them suffer. Maya and company thought that Guardian Hearts usually appears when Kazuya is getting along with a girl. Not knowing that Guardian Hearts is actually Hina, they leave her alone with Kazuya in an attempt to lure Guardian Hearts. (Source: AniDB)

Agent Aika

A catastrophic earthquake has left Tokyo, and most of the Earth for that matter, under the sea. Aika is a salvager who retrieves various remains from the watery ruins. When Aika accepts the dangerous mission of locating and obtaining the mysterious Lagu, she discovers that she's not the only one after it.

Brave Witches

As humanity's war with the Neuroi—a mysterious, hostile alien race possessing weapons of unparalleled power—continues being fought across Europe and Africa, a new fighter squadron is formed. The 502nd Joint Fighter Wing, also known as the Brave Witches, operates on the eastern front, scouring the icy vastness of Orussia in search of alien invaders. However, one of the Brave Witches' members suffers severe injuries on her way to the squadron's headquarters, rendering her unable to participate in any operations. As a result, her sister, Hikari Karibuchi, volunteers to take her place. Though not possessing any special abilities or significant magical powers, she is determined to live up to the expectations of her new comrades and prove herself worthy of the name of a Witch. (Source: MAL Rewrite)

Pale Cocoon

A future where the continuity of history has broken off, a world of enormous ruins that continues endlessly. Oceans and continents have vanished, existing only within the archives brought up from the remains. Ura works in the Archive Excavation Department, which restores and analyzes the data left behind. One day, he finds a disturbing visual record... (Source: Anime News Network)