Baku Yumemakura's unearthly romance novel has been adapted into a manga by Takashi Noguchi. The plot follows Minamoto no Yoshitsune (Kurou) - a man from the twelfth century, who is driven to take refuge in the mountains after he's defeated by his brother, Minamoto no Yoritomo, the very first shogun of Japan. Despite history recording his suicide, Kurou's fate led him to cross paths with Kuromitsu - a stunning and enigmatic woman way off the grid. With deep emotions, Kurou falls head over heels for Kuromitsu, but his beloved holds a deep, dark secret. Kurou's world is shattered when he learns he is, in fact, immortal and is destined to live for thousands of years while the world transforms into a futuristic society.