True Calendar (T.C.) 71 - A new age where 70% of the human population lives in space thanks to the development of "Dyson Sphere", a city in space. The world is divided into two main powers: The Dorssia Military Pact Federation, a power which grew out of a military alliance, and the Atlantic Rim United States (ARUS), which grew in power as it expanded its trade agreements. The minor nation of JIOR has declared neutrality between these two forces and maintains its peace through economic prosperity. Within the JIOR's Sphere, Haruto Tokishima lived an ordinary life as a high school student in the division known as "Module 77"—until the Dorssian military begins their sudden invasion! But the whole world will be shaken when Haruto meets the mysterious humanoid weapon, Valvrave! (Source: Aniplex USA) Notes: Although adapted from the TV anime, the novels expand on information and have a few new scenes.

From Seven Seas: In Koyomi Hidaka's world, travel between slightly different alternate universes is commonplace. After his parents' recent divorce, Koyomi lives with his father and falls in love with a girl named Sato Shiori when they meet at his father's workplace. But their young love seems doomed when their parents get remarried—to each other. Is there some parallel world out there where Koyomi and Shiori can be together as lovers, not step-siblings...and what could be the price if they try to find out?

In a world where people regularly travel between slightly different parallel universes, Koyomi Takasaki lives with his mother after his parents' recent divorce. Awkward and studious, he has trouble making friends at his new school, until his classmate Kazune Takigawa seeks him out. She claims that she's moved here from another world where she and Takasaki are lovers but could he be the one who's actually from a parallel world? Source: Seven Seas Entertainment