"Period" is how magic users called who beat "Spiral"—monsters that were summoned from isolation. Due to the rise of these beings, 14-year-old apprentice Period Haru, who is a part of the Eighth Arc-end Division, is called to break the cycle and cast himself into the endless battle. However, a mysterious thievery occurred and sank the division into bankruptcy, forcing Haru and his other comrades have to leave their headquarters. To rebuild a branch, they have to overcome quest after quest. (Source: MAL News)

Ten years after the Holy War in Hong Kong, Mochizuki Jirou, aka the Silver Blade, and the lone hero who fought and defeated the Kowloon Children despite the loss of his lover, returns to Japan with his young brother, Mochizuki Kotarou. The two quickly discover that the Kowloon Children who survived the Holy War are seeking to infiltrate the "Special Zone", a thriving city protected by an invisible barrier that will not allow Kowloon Children entrance, unless they're invited. Red Bloods refers to the humans; Black Bloods are the vampires, and the Mochizuki Brothers are Old Blood, the last descendants of an elite clan of vampires. When Kotarou is abducted by one of the Kowloon Children, Jirou has no choice but to fight once more. (Source: ANN)

In the year Cosmic Era 0071, a wartime brawl between two mobile suits results in the destruction of a neutral country. Shinn Asuka finds his entire family killed as casualties of the violence, and swears his life toward a vengeful pursuit of the Earth's Natural forces, under the impression they were the ones responsible for his family's death. Shinn works his way up through the ZAFT military forces, eventually gaining access to the cockpit of the prototype Impulse mobile suit. Athrun Zala, a veteran of the recent war employed in the service of diplomat Cagalli Yula Athha, finds himself drawn into a new conflict between the Naturals and the Coordinators: human beings artificially enhanced before birth and hated by the Naturals for their biological advantages. As the new war rears its head and violence becomes inevitable, Athrun finds himself as a mentor to the bitter Shinn. Athrun must steer the young pilot towards a mindset of mercy before his rage and desire for vengeance consumes him. [Written by MAL Rewrite]

The story of the card game follows what happens when "Hairou" portals suddenly open, fusing five different worlds together. As a result, various mysterious "Exceed" powers are awakened in teenaged girls. An academy for these so-called "Progress" girls is built on the isolated Seiran Island in the Pacific. (Source: ANN)