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.

Angelise Ikaruga Misurugi is the first princess of the noble Misurugi Empire. The kingdom has seen great power and prosperity due to the advancement of the revolutionary technology known as Mana, an abstract bending of light that has reduced the world's problems of war and pollution to a timeless peace. However, not all are blessed with the ability to wield Mana. Those who cannot are labeled Norma, outcasts of society who are considered a threat to civilization and live under constant persecution, and Angelise herself is one of many who want the Norma exterminated. But as Angelise's sixteenth birthday commences, it is discovered in a shocking revelation that she is actually a Norma. Chaos ensues, the public is outraged, and the once adored princess is exiled to Arzenal: a remote military base where Normas are forced into conscription. Now, the former royal must adapt to a harsh and vastly different lifestyle; piloting mechanical robots known as Paramail to fend off large, devastating beasts referred to as DRAGONs. However, a sinister truth about these savage creatures threatens to change everything.

Since ancient times, the citizens of Slantania have lived within a shroud of miasma, a force that brings forth monsters creating havoc around the world. When the kingdom's Order of Knights becomes incapable of containing the monsters, the Grand Magus summons a holy maiden—the legendary Saint—to obliterate the horrid creatures and restore peace. One evening, as Sei Takanashi returns home from a long day at work, a magical force pulls her into a foreign world. Upon her arrival to the kingdom of Slantania, she overhears that the Grand Magus inadvertently summoned two Saints—Sei and a brown-haired girl. Needing only one holy maiden, the prince declares the other girl as the Saint, leaving Sei to her own devices. Sei sets her sight on the Medicinal Flora Research Institute, an establishment known for its studies regarding herbs and potions. While indulging in her latest passion, Sei has a fateful encounter with the commander of the Third Order of Knights. But little does she know, her aptitude as a Saint will continue to exert its influence over her new life.

Shinichirou Nakagami was living the life other boys from his grade could only dream of—staying under the same roof as prodigal student Hiromi Yuasa. However, the bright and cheerful Hiromi has been depressed and cold at home ever since her mother passed away. While he is the subject of the ignorant jealousy of his peers, rumors begin to spread when Shinichirou meets Noe Isurugi—a girl known for cursing classmates, curses which always end up becoming reality. Noe curses Shinichirou as well, but two pits are created when you curse someone, and her curse on Shinichirou comes back to bite her in the form of a raccoon to her beloved chicken, Raigomaru. Despite this, she does not shed a single tear; Noe had had her tears stolen. For Noe to be able to cry again, she would need the tears of another, and Shinichirou knows a person whose tears he wants to take away.