This is the story about how Dubus, Lafiel's father, and Plakia after an adventure on a mysterious, abandoned spaceship decided to have a daughter together and why Dubus gave her the name Lafiel.

In the distant future, humanity is under attack by the Abh Empire, a race of advanced humanoid beings possessing vastly superior technology. As countless worlds fall to the Abh, mankind establishes the Four Nations Alliance—a resistance faction made up of the United Mankind, the Republic of Greater Alcont, the Federation of Hania, and the People's Sovereign of Union Planets. Seikai no Monshou tells the story of Jinto Linn. When he was young, his father—the president of Martine—sold their world in exchange for a high position in the empire. Now a young count, Jinto must learn the ways of Abh nobility and live among those who subjugated his people. Helping him is Lafiel Abriel, an austere Abh princess whom Jinto quickly befriends. While traveling to Jinto's new school in the Abh homeland, their ship is caught in a violent space battle between the fleets of the Alliance and the Abh. Jinto and Abriel are thrust into the conflict, unaware that this skirmish marks the beginning of a full-scale war between the Abh Empire and mankind.

Three years after their adventure, Lafiel becomes captain on the brand new assault ship Basroil and Jinto finishes his training to become a supply officer and joins Lafiels crew. They set out to join a large fleet with the mission of defending the strategically important Laptic Gate from a force 15 times larger than their own. And to bring even more worries, their new fleet commander is from the Bebous family, a family notorious for their "Spectacular Insanity".

Due to a lack of ambassadors for the recently-conquered worlds the rapidly advancing fleet of the Bebaus brothers leave behind, Lafiel is appointed Territorial Ambassador of the planet Lobnas II. Upon arriving to the planet Jinto and Lafiel discover that the planet was used by the United Mankind as a prison planet and now has a million prisoners on the only inhabited island. The prisoners are parted in three blocks. The western where women are housed, the eastern belongs to the men and the central is mixed under the restriction that all prisoners living there are sterilized. The women in the western sector want to emigrate from the planet of fear for the men and when they do the men in the east rebel, overthrowing the guards and capturing Jinto to try to stop the emigration of the women. At the same time an enemy fleet heads toward the system forcing Lafiel to abandon Jinto.

Jinto and Lafiel were riding on a light-armed transport ship "Bokbrusue" and navigating at the planar space of the Hyde System. This was for Jinto to govern the Hyde System, which returned to Empirial rule after the Union retreated, officially as an Earl. However, the government of Martin, Jinto`s motherland, resisted obstinately against the Empirial rule. On the other side, "Daiichi Jyuurin Sentai" (the First Devastation Fleet), formed with the new ship type "Attack Vessel", travelled to the Hyde System for drilling practices, but...

Kojirou Shindou. Cabinet Office Director-General for Policy Planning, is at Haneda Airport for a business trip. While the plane is on the runway, a giant structure suddenly appears out of thin air. The plane carrying Shindou and 251 passengers is taken undamaged inside the giant structure. After everyone disembarks, a man who looks like an ordinary human being shows up. He assures those from the plane that they're not in any danger. Shindou asks him to identify himself and explain the situation. Then the outside of the structure is displayed on a large screen, and at the same time, every passenger's cell phone starts ringing all at once. On each cell phone screen is a message from this man, to every one of Japan's citizens: "I, Yaha-kui zaShunina, hereby notify you that I am going to intervene in Japan's internal affairs." What is this young man's goal? And will Shindou manage to become an intermediary between Japan and the Anisotorons...?

Kojirou Shindou. Cabinet Office Director-General for Policy Planning, is at Haneda Airport for a business trip. While the plane is on the runway, a giant structure suddenly appears out of thin air. The plane carrying Shindou and 251 passengers is taken undamaged inside the giant structure. After everyone disembarks, a man who looks like an ordinary human being shows up. He assures those from the plane that they're not in any danger. Shindou asks him to identify himself and explain the situation. Then the outside of the structure is displayed on a large screen, and at the same time, every passenger's cell phone starts ringing all at once. On each cell phone screen is a message from this man, to every one of Japan's citizens: "I, Yaha-kui zaShunina, hereby notify you that I am going to intervene in Japan's internal affairs." What is this young man's goal? And will Shindou manage to become an intermediary between Japan and the Anisotorons...?

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Battles for ancient kingdoms are nothing compared to the battles of a classroom! Awakening from magical stasis after a thousand years, the Dark Lord Leonis suddenly finds himself in the body of a ten-year-old boy! He quickly meets Riselia, a girl confronting the Voids, creatures that have nearly exterminated humanity. Determined to uncover the mysteries of this strange new era, Leonis enrolls in Excalibur Academy, a school that trains students to fight back against these enigmatic monsters. Could the Voids hold some connection to Leonis's past?

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Written by Akamitsu Awamura, the series takes place in a private high school involving the concept of "saviors." They are known as people who possess awakened memories of their past lives. The story tells of a young boy named Moroha Haimura who comes to this private school. At the school, there are two types of people: Saviors, who fight enemies with weapons and techniques gleaned from the Puraana powers from their own bodies, and Kuroma, who wipe out enemies with magic to manipulate the Maana powers that surpass physics. Moroha Haimura is the first person with past lives of both Shirogane and Kuroma.

Written by Akamitsu Awamura, the series takes place in a private high school involving the concept of "saviors." They are known as people who possess awakened memories of their past lives. The story tells of a young boy named Moroha Haimura who comes to this private school. At the school, there are two types of people: Saviors, who fight enemies with weapons and techniques gleaned from the Puraana powers from their own bodies, and Kuroma, who wipe out enemies with magic to manipulate the Maana powers that surpass physics. Moroha Haimura is the first person with past lives of both Shirogane and Kuroma.