The discovery of a hypergate on the Moon once allowed the human race to teleport to Mars. Those who chose to settle there unearthed a technology far more advanced than that of their home planet, which they named "Aldnoah." This discovery led to the founding of the Vers Empire of Mars and a declaration of war against the "Terrans," those who stayed behind on Earth. However, a battle on the moon—later called "Heaven's Fall"—caused the hypergate to explode, destroying the moon and leading the two planets to establish an uneasy ceasefire. Their peace was a fragile one, however. Fifteen years later, high school student Inaho Kaizuka witnesses the plotted assassination of the Vers Empire's Princess Asseylum Vers Allusia, who had come to Earth in hopes of repairing the relationship between the empire and its homeland. The ceasefire is shattered, and the Martians declare war on the Terrans once again. In the face of this insurmountable enemy, Inaho and his friends must now fight against the Vers Empire to settle the war once and for all. [Written by MAL Rewrite]

Long before Rikuo Nura was born, the legendary youkai Nurarihyon, leader of a "Night Parade of One Hundred Demons," fell in love with a human woman. Though the two would initially find happiness, a threat from the terrifying fox-demon Hagoromo Gitsune would get in the way of their relationship. In the present, Rikuo has taken his rightful place as the heir to the Nura Clan. While he has accepted his youkai side, he must continue to maintain the secret of youkai, a difficult task when faced with the Keikain onmyouji clan and his youkai-obsessed friend, Kiyotsugu. Even so, Rikuo will do what he must to protect those important to him. The reappearance of the sinister Hagoromo Gitsune marks the start of Rikuo's most fearsome trial yet. The frightening creature bears a personal vendetta against his family and will stop at nothing to see her dream come to fruition. The world stands at a precipice, an all-out war that will drag Rikuo centerstage. [Written by MAL Rewrite]

When Qian Yunshang's marriage to Ye Youming is arranged by the emperor, she is terrified that the bad blood between their families will lead to her being treated miserably in the Ye household. Torn between duty and concern for his daughter, Qian Aotian devises a reckless plan. He summons his firstborn daughter—her existence unknown to all but his own family—to be the stand-in for her younger sister. Due to her unusual powers, Qian Yun Xi was exiled by her family when she was a child. Deprived of filial affection, she made a life of her own amid the wilderness on Mt. Ling Yun. However, everything begins to change when she marries Ye Youming in her sister's stead. Harboring immense contempt for the family of Qian, Ye Youming refuses to acknowledge Qian Yun Xi as his wife and treats her coldly, going so far as to banish her from his palace grounds. But he can only resist her childlike charm and boldness for so long... [Written by MAL Rewrite]

After the decline of the once robust fields of science and technology, a new energy source known as magic fuels the modern era. Humanity creates forbidden biological weapons: Gears. Those Gears eventually stand against humanity in a rebellion. Although they manage to overcome in the struggle for survival known as the Crusades, humanity's losses are so great that even after several decades pass, their emotional wounds remain unable to fully heal. Sin Kiske, the child of a human and a Gear, heads to his father Ky and mother Dizzy's wedding ceremony. Their wedding breaks the ultimate taboo: a union between a human and a Gear. Even with the world at peace, it took many years for such a ceremony to come to fruition. Despite the complex array of emotions surrounding it, the wedding ceremony is met with blessings. When suddenly, a mysterious girl appears... The fated child inheriting Gear blood–and the mysterious girl who despises Gears. Their meeting would shake the world.