Office worker Yoshida has been crushing on his coworker, Airi Gotou, for five years. Despite finally scoring a date with her, his confession is promptly rejected. Drunk and disappointed, he stumbles home, only to find a high school girl sitting on the side of the road. The girl, needing a place to stay the night, attempts to seduce Yoshida. Despite rejecting her advances, he nevertheless invites her into his apartment. The next morning, the girl, introducing herself as Sayu Ogiwara, reveals that she has run away from Hokkaido all the way to Tokyo. During her six-month spree, she continually traded sexual favors for a roof over her head. Yoshida, however, remains unswayed by her seduction. Instead, he has her do a different kind of work—one that entails washing dishes and doing laundry. And so, a touching relationship between a heartbroken adult and a runaway high school girl begins.

In this prequel to the "X" TV series, a beautiful, young, bedridden dreamgazer named Kakyou remembers the life and death of a remarkable young woman whom he met in dreams. He also recounts his dreams of a tragic future in which the fate of the Earth will be decided.

His destiny has finally arrived as the young Shirou Kamui returns to Tokyo after 6 years. A powerful psychic, Kamui vows to protect the happiness of his childhood friends Fuuma and Kotori, even if it means avoiding them. But fate is cruel, whether or not Kamui wants to be involved; he holds the future of the world in his hands, given the choice of becoming a Dragon of Heaven or a Dragon of Earth. The Seven Seals gather, and so do the Seven Angels; all individuals who have their destiny carved out as one who would battle for the fate of the world. What future will Kamui choose to become reality?

In a shocking turn of events, humanity has won its first battle in the Ragnarök tournament—a series of 13 fights that will decide the fate of mankind. Zeus, the head of gods, sends the demigod Heracles for the next round to avenge the humiliated Greek pantheon. To face this hero loved by gods and humans alike, the Valkyrie Brunhilde decides to use Heracles' complete moral opposite: the infamous serial killer Jack the Ripper—leaving human beings unsure who they should support. Meanwhile, tensions begin to rise between various divine pantheons, and rumors of a traitor jeopardize the unity of those who want to annihilate humanity. As the line between friend and foe becomes blurred, Brunhilde will do everything she can to make her machinations successful.