Our Last Crusade or the Rise of a New World

Our Last Crusade or the Rise of a New World (キミと僕の最後の戦場、あるいは世界が始まる聖戦), abbreviated as KimiSen (キミ戦), is a Japanese light novel series written by Kei Sazane and illustrated by Ao Nekonabe. Fujimi Shobo, under Kadokawa Corporation, has published fifteen volumes and three short story collections since May 2017 under their Fujimi Fantasia Bunko label. A manga adaptation by Okama was serialized in Hakusensha's Young Animal magazine from May 2018 to March 2021. Both the light novel and manga are licensed in North America by Yen Press. An anime television series adaptation by Silver Link aired from October to December 2020. A second season by Silver Link and Studio Palette premiered in July 2024.

Plot
For years, a seemingly endless war has raged between the technologically advanced Heavenly Empire and the country of powerful magic users known as the Nebulis Sovereignty. In the present day, a master swordsman from the Empire named Iska and the "Ice Calamity Witch" from Nebulis' ruling family, Aliceliese, meet on the battlefield, determined to kill each other. However, even as enemies, both harbor a secret desire to peacefully end the war between their two nations without further bloodshed. As circumstances continuously conspire to bring them together, Iska and Alice begin to wonder if they can find peace with each other at first, and through this, create a path to bring an end to this war.

Main characters

 * Iska (イスカ)
 * The unofficial leader of the Heavenly Empire's 907th Unit and an unparalleled swordsman who wields the black and white colored astral swords that can negate most types of magic. At the age of 16, he was recognized as the youngest Saint Disciple in the Empire's history. However, for unexplained reasons, he freed a witch who was being held in an Imperial prison, resulting in him being stripped of his title and then imprisoned for a year as punishment. Now, the leaders of the Empire have given him another chance at freedom though, provided he kills a certain purebred witch. However, Iska seeks to find a way to end the ongoing war without further bloodshed.
 * The unofficial leader of the Heavenly Empire's 907th Unit and an unparalleled swordsman who wields the black and white colored astral swords that can negate most types of magic. At the age of 16, he was recognized as the youngest Saint Disciple in the Empire's history. However, for unexplained reasons, he freed a witch who was being held in an Imperial prison, resulting in him being stripped of his title and then imprisoned for a year as punishment. Now, the leaders of the Empire have given him another chance at freedom though, provided he kills a certain purebred witch. However, Iska seeks to find a way to end the ongoing war without further bloodshed.


 * Aliceliese Lou Nebulis IX (アリスリーゼ・ルー・ネブリス9世)
 * Aliceliese, or "Lady Alice," is the purebred "Ice Calamity Witch" with powerful ice-based magic that rivals most other astral mages in her homeland of the Nebulis Sovereignty. As a daughter of the Nebulis royal family, Alice is in line for the throne that Millavair, the current queen and her mother, inhabits. After running into Iska multiple times, she starts to develop feelings for him, and even makes an attempt to recruit him to her cause. Like Iska, she quietly seeks to end the war between the two countries without further bloodshed as well. However, these ideals raise tensions with her mother, who sees no path to peace with the Empire, even going as far as burning artwork in her personal room that was made within the Empire.
 * Aliceliese, or "Lady Alice," is the purebred "Ice Calamity Witch" with powerful ice-based magic that rivals most other astral mages in her homeland of the Nebulis Sovereignty. As a daughter of the Nebulis royal family, Alice is in line for the throne that Millavair, the current queen and her mother, inhabits. After running into Iska multiple times, she starts to develop feelings for him, and even makes an attempt to recruit him to her cause. Like Iska, she quietly seeks to end the war between the two countries without further bloodshed as well. However, these ideals raise tensions with her mother, who sees no path to peace with the Empire, even going as far as burning artwork in her personal room that was made within the Empire.

Heavenly Empire

 * Jhin Syulargun (ジン・シュラルガン)
 * A skilled sharpshooter with the 907th Unit who usually speaks in a dry tone.
 * A skilled sharpshooter with the 907th Unit who usually speaks in a dry tone.


 * Mismis Klass (ミスミス・クラス)
 * Captain of the 907th Unit. Despite looking like a child, acting like a klutz, and having low physical strength, she still provides moral support to her comrades in the Unit. Later on, she gets exposed to a star vortex and is branded as an astral mage. Though her powers are currently unknown, the rest of the Unit is forced to hide her brand lest she be experimented on by the Empire.
 * Captain of the 907th Unit. Despite looking like a child, acting like a klutz, and having low physical strength, she still provides moral support to her comrades in the Unit. Later on, she gets exposed to a star vortex and is branded as an astral mage. Though her powers are currently unknown, the rest of the Unit is forced to hide her brand lest she be experimented on by the Empire.


 * Nene Alkastone (音々・アルカストーネ)
 * A high-spirited field mechanic and weapons designer in the 907th Unit who creates and deploys anti-magic equipment during missions.
 * A high-spirited field mechanic and weapons designer in the 907th Unit who creates and deploys anti-magic equipment during missions.


 * Risya In Empire (璃洒・イン・エンパイア)
 * The fifth seat of the Saint Disciples.
 * The fifth seat of the Saint Disciples.


 * Nameless (ネームレス)
 * An assassin who is the eighth seat of the Saint Disciples.
 * An assassin who is the eighth seat of the Saint Disciples.


 * Shanorotte Gregory (シャノロッテ・グレゴリー)
 * The captain of the 104th Unit. She is a friend of Mismis.
 * The captain of the 104th Unit. She is a friend of Mismis.


 * Emperor Yunmelngen (天帝ユンメルンゲン)
 * The emperor of the Empire.
 * The emperor of the Empire.


 * Johaim Leo Armadel (ヨハイム・レオ・アルマデル)
 * The first seat of the Saint Disciples.
 * The first seat of the Saint Disciples.


 * May (冥)
 * The third seat of the Saint Disciples.
 * The third seat of the Saint Disciples.


 * Magnacasa Gunfight (マグナカッサ・ガンファイト)
 * The fourth seat of the Saint Disciples.
 * The fourth seat of the Saint Disciples.


 * Sir Karosos Newton (サー・カロッソス・ニュートン)
 * The tenth seat of the Saint Disciples.
 * The tenth seat of the Saint Disciples.


 * Garganly (ガルガンリィ)
 * The eleventh seat of the Saint Disciples.
 * The eleventh seat of the Saint Disciples.

Nebulis Sovereignty

 * Rin Vispose (燐・ヴィスポーズ)
 * Alice's personal maid and bodyguard who has served her from early childhood. In addition to her physical and martial prowess, Rin is a powerful astral mage who uses earth-based magic to create golems.
 * Alice's personal maid and bodyguard who has served her from early childhood. In addition to her physical and martial prowess, Rin is a powerful astral mage who uses earth-based magic to create golems.


 * Sisbell Lou Nebulis IX (シスベル・ルゥ・ネビュリス9世)
 * Alice's younger sister who was held captive in the Empire until Iska freed her one year prior to the start of the story. She has a psychometric-style ability called "Lamplight," where she can see things that happened up to 200 years in the past, within 3 kilometers (about 2 miles) around her. She believes there is a threat to her family that only Iska can help her with.
 * Alice's younger sister who was held captive in the Empire until Iska freed her one year prior to the start of the story. She has a psychometric-style ability called "Lamplight," where she can see things that happened up to 200 years in the past, within 3 kilometers (about 2 miles) around her. She believes there is a threat to her family that only Iska can help her with.


 * Millavair Lou Nebulis VIII (ミラベア・ルゥ・ネビュリス8世)
 * Queen of the Nebulis Sovereignty.
 * Queen of the Nebulis Sovereignty.


 * Elletear Lou Nebulis IX (イリーティア・ルゥ・ネビュリス9世)
 * Alice and Sisbell's older sister.
 * Alice and Sisbell's older sister.


 * Lord Mask (仮面卿)
 * The acting head of the Zoa family.
 * The acting head of the Zoa family.


 * Kissing Zoa Nebulis IX (キッシング・ゾア・ネビュリス9世)
 * A purebred member of the Zoa family. She has the power to deconstruct and reconstruct matter.
 * A purebred member of the Zoa family. She has the power to deconstruct and reconstruct matter.


 * Founder Nebulis (始祖ネビュリス世)
 * The founder of the Nebulis Sovereignty.
 * The founder of the Nebulis Sovereignty.


 * Growley (グロウリィ)
 * The head of the Zoa family. He is confined to a wheelchair.
 * The head of the Zoa family. He is confined to a wheelchair.


 * Talisman (タリスマン)
 * The head of the Hydra family.
 * The head of the Hydra family.


 * Vichyssoise Alek Hydra (ヴィソワーズ・アレク・ヒュドラ)
 * A member of the Hydra family who is an inquisitor.
 * A member of the Hydra family who is an inquisitor.

Other characters

 * Crosswell Nes Lubigate (クロスウェル・ネス・リビュゲート)
 * The former wielder of the astral swords who is Iska and Jhin's mentor.
 * The former wielder of the astral swords who is Iska and Jhin's mentor.


 * Salinger (サリンジャー)
 * A criminal who is imprisoned for attacking the previous queen.
 * A criminal who is imprisoned for attacking the previous queen.

Light novel
Our Last Crusade or the Rise of a New World is written by Kei Sazane and illustrated by Ao Nekonabe. The first light novel volume was published on May 20, 2017, by Fujimi Shobo under their Fujimi Fantasia Bunko imprint. As of June 2023, fifteen volumes and three short story collections have been published. Yen Press has acquired the license for the series in North America and published the first volume on September 24, 2019.

Manga
A manga adaptation of the series by Okama was serialized in Hakusensha's Young Animal magazine from May 11, 2018, to March 12, 2021. Seven volumes were published from December 26, 2018, to April 28, 2021. Yen Press also licensed the manga for North American release, and the first volume was released on November 5, 2019.

Anime
An anime television series adaptation was announced at the "Fantasia Bunko Dai Kanshasai 2019" event on October 20, 2019. The series was animated by Silver Link and directed by Shin Ōnuma and Mirai Minato, with Kento Shimoyama handling series composition and Kaori Sato as character designer and chief animation director. Seima Iwahashi, Ryōta Tomura, and Ryūichirō Fujinaga of Elements Garden composed the series' music. The series aired from October 7 to December 23, 2020, on AT-X and other channels. Kaori Ishihara performed the opening theme "Against.", while Sora Amamiya performed the ending theme "Koori no Torikago" (氷の鳥籠).

Funimation acquired the series and streamed it on its website in North America and Britain and Ireland, and on AnimeLab in Australia and New Zealand. On October 27, 2020, Funimation announced that the series would receive an English dub, which premiered the following day. Following Sony's acquisition of Crunchyroll, the series was moved to Crunchyroll.

A sequel had been green-lit on October 1, 2021, which was later revealed to be a second season. The second season is animated by Silver Link and Studio Palette and directed by Yuki Inaba, with Studio Palette credited for series composition, Kaori Yoshihara designing the characters, and Elements Garden composing the music. It was initially scheduled for 2023, but was later delayed. The second season premiered on July 10, 2024. AliA performed the opening theme "Senaka Awase" (セナカアワセ), while Sizuk performed the ending theme "Para Bellum". Crunchyroll licensed the series. Plus Media Networks Asia has licensed the series in Southeast Asia and is broadcasting it on Aniplus Asia.