The Imperial Seal has been passed down through the generations since ancient times. It confers great power unto the warriors that it chooses. This is the story of those warriors. It is a time of chaos and of civil war. It is a time when great armies clash in titanic battles and great heroes carve their names in history. It is also a time of death and destruction, when the people of the land live in constant fear of the sword. Onto this stage steps the reluctant Rikuson (Lu Xun), whose family had been the guardians of the Imperial Seal up until it was stolen by Sonsaku. At the behest of his mentor Rikuson offers his services to Sonsaku with the intention of confirming the will of the Imperial Seal. However, assassins strike down Sonsaku and the Imperial Seal is lost. So begins, Rikuson’s journey to recover the Imperial Seal and discover his destiny. (Source: AniDB)

The fairy tale follows a young man named Budori Gusuko in the Tohoku forests of northeastern Japan in the 1920s. After an onslaught of droughts and natural disasters, Budori is forced to leave his home and search for a better life elsewhere. Budori joins a group of scientists at the Ihatov Volcano Department, which deals with the same natural disasters that drove Budori from his home.

The signing of a peace treaty has secured a tenuous ceasefire between mankind and the Zex, beings who emerged from space/time rifts connected to mysterious, distant worlds. Partnered with a Zex named Rigel, Azumi Kakamigahara must shoulder the fate of her own idyllic world. The unlikely pair head to newly established Fujimisaki Academy, where their destinies await.

At the behest of her father, Yui Komori goes to live in a secluded mansion, home to the six Sakamaki brothers—Shuu, Reiji, Ayato, Kanato, Laito, and Subaru—a family of vampires. Though at first the siblings are confused as to why the girl has arrived, they soon realize that she is to be their new "sacrificial bride," not to mention their other, more carnal intentions for her. After meeting the brothers, Yui quickly begins to question why her father would have sent her here and why she feels a strange, new pain in her chest. With each brother more sadistic than the last, Yui's life as a captive takes a harrowing turn in her new home. As her days turn into endless nights, and each brother vows to make her his own, Yui falls deeper and deeper into madness and ecstasy.