In 1995, all 800 habitants of the isolated Kamikakushi Island vanished in one night, all but a single girl who lost her memory. The cause of the disappearances was never identified.

Four years later, that girl, Mari, transfers to a girl’s dormitory school, Kaihou Gakuen, leaving behind her grandmother who had been her guardian ever since the incident. There, she meets Hagino.

…

In reality, Hagino is actually an alien who was sent to Earth in order to reconnoiter prior to an invasion. The event on Kamikakushi Island occurred when the 200-member crew of a battleship, the Blue, whose captain was Hagino and the island’s inhabitants had killed each other. The Blue was seriously damaged and hidden. Hagino had since blended into human society and continued her reconnaissance.

Tomoya Okazaki is a third year student labeled as a delinquent. Everything seems to be unchanging for his school life until he meets Nagisa, and Tomoya finds that his life is about to change. He starts to have dreams of a bleak world and meets a girl who has the ability to fuse junk together in order to create things, and doing so, creates a body out of junk for him. He is then reborn into this empty world and follows around the girl, the only two existences who are “alive.”

The story revolves around the protagonist Hirono Hiro, a poor high school boy who draws shoujo manga for his living. One cold Christmas night after meeting a very strange woman in church, his bike gets stolen by another strange girl. He runs after her and finds her collapsed on the street. Her name is Miyamura Miyako and her bag got stolen by a man on a motorbike. Soon after, they start hanging out together, enjoying highschool life and whatnot. Hiro’s life is also strongly dictated by Shindou Kei, his childhood friend.

Sakai Yuuji, a high school student who expected his normal life to last forever, is dead. When he was on his way home he witnessed a shocking view as the world suddenly froze: people were engulfed by blue flames and a monster resembling a large doll swallowed them. Just as the monster prepared to consume Yuuji, a sword-wielding girl in black attire with flaming red eyes and hair that burns like embers saved him from the monster. The girl called herself a “Flame Haze” who hunts the “Guze no Tomogara”, creatures from another world. As Yuuji noticed a blue flame in his chest, she called him a “Torch”, a temporary replacement, saying that the “real” Yuuji’s existence had already ended. Unfazed, Yuuji befriended the strange girl, named her “Shana”, and joined her fight against Tomogara and other Flame Hazes.

Yasuoka Shion lost her parents, and her voice, when she was young. In a murder. She was found amidst a blood-soaked room, and the only hint for the suspect was a Shougi board and one piece: the King. Now, Shion steps into the world of female professional Shougi players. As her popularity and fame slowly rises, so do the questions about her past, particularly the murder case that was never solved.