With the seas under constant threat from the hostile Abyssal Fleet, a specialized naval base is established to counter them. Rather than standard naval weaponry, however, the base is armed with Kanmusu—girls who harbor the spirits of Japanese warships—possessing the ability to don weaponized gear that allows them to harness the powerful souls within themselves. Fubuki, a young Destroyer-type Kanmusu, joins the base as a new recruit; unfortunately for her, despite her inexperience and timid nature, she is assigned to the famous Third Torpedo Squadron and quickly thrust into the heat of battle. When she is rescued from near annihilation, the rookie warship resolves to become as strong as the one who saved her.

Calamities are plaguing the land of Earthsea and dragons have been seen fighting above the clouds—something which has never happened before. Sparrowhawk, a powerful Archmage, sets out to uncover the mystery behind these concerning events and meets Prince Arren along the way. Arren is the fugitive heir to the Kingdom of Enlad and a seemingly quiet and distressed lad. Wandering aimlessly in an attempt to escape the dark presence haunting him, he decides to tag along Sparrowhawk on his journey. However, their arrival in the seaside settlement of Hort Town is met with unexpected trouble—Lord Cob, a powerful evil wizard obsessed with eternal life, stands in their way. Forced to confront him, the pair joins forces with Tenar—an old friend of Sparrowhawk—and Therru, the ill-fated orphan girl she took in. But the enemy's cunning hobby of manipulating emotions may just prove to be catastrophic for the young prince. Set in a magical world, Ged Senki goes beyond the classical battle between the forces of good and evil, as it explores the inner battles of the heart.

With World War II right around the corner, intelligence on other countries' social and economic situation has become a valuable asset. As a result, Japan has established a new spy organization known as the D Agency to obtain this weapon. Under the command of Lieutenant Colonel Yuuki, eight agents have been assigned to infiltrate and observe some of the most powerful countries, reporting on any developments associated with the war. In order to carry out these dangerous tasks, these men have trained their bodies to survive in extreme conditions and studied numerous fields such as communications and languages. However, their greatest strength lies in their ability to manipulate people in order to obtain the information necessary to give their nation the upper hand.

The Mutou family leads a peaceful life: Kouichirou works at a construction site and his wife Mari is returning from an overseas trip. Their daughter Ayumu has just finished her track practice while their son Gou is playing video games at home. However, life as they know it is flipped upside down when a calamitous earthquake strikes the entire Japanese archipelago—obliterating the face of the country in an instant. With society crumbling around them and their nation gradually sinking into the ocean, the Mutou family must band together to survive the catastrophe. Treading the near-apocalyptic setting, they struggle not only to stay alive, but also to learn the difficulty of coping with loss.