Godō Kusanagi is a 16-year-old high school boy, who once killed the god "Verethragna" and acquired the title of "Campione" ("God Killer") when he was 15. Erica Brandelli is a 16-year-old Italian girl, who is a "Great Knight" of the magic society "Bronze Black Cross" and had fought together with Godo to defeat Verethragna. Godo doesn't like fighting but his title of "Campione" makes him get involved in battles against other Campiones and uncontrollable gods.
Mina Tepeş, the Princess of the ancient covenant and ruler of all vampires, wants her race to stop hiding from the humans. Using her vast wealth, she has paid off Japan's entire national debt and by doing so, gained the right to create a district off Japan's coast that is to become the future haven to vampires worldwide. But when she finally attempts to make public the existence of vampires to the world some politicians, terrorists and rival factions are plotting to assassinate Mina before she has a chance to get Japan's and international recognition for the Vampire Bund. Now she must rely on her strength, cruelty and those closest to her, while trying to make a normal life.
Shirou Emiya lost his parents in a fire when he was young and was later adopted by a sorceror by the name of Kiritsugu Emiya. Although he was full of admiration for his adopted father and yearns to become an ally of justice, Shirou has limited powers and was unable to become a strong sorceror like his father. That is until one fateful day, he was drawn into the Holy Grail War and had to summon a female "Servant" known as Saber in order to protect himself. It turns out that the Holy Grail War involves a series of battles among powerful sorcerors to fight for the possession of a relic that will grant one's wishes, the Holy Grail. There are altogether seven "Masters" who can summon their respective "Servants" from different classes known as Saber, Archer, Rider, Berserker, Lancer, Caster and Assasin. These "Servants" have to hide their names in order not to reveal their weaknesses to the enemies. The story revolves around Shirou and his entanglement in the Holy Grail War.
GOSICK takes place in 1924 in a small, made-up European country of Sauville. The story centers on Kazuya Kujo, the third son of a Japanese Imperial soldier, who is a transfer student to St. Marguerite Academy, where urban legends and horror stories are all the rage. There he meets Victorique, a mysterious yet beautiful and brilliant girl who never comes to class and spends her days reading the entire content of the library or solving mysteries that even detectives can't solve.
Isei finds new troubles about to enter into his life and two even sleeping in his bed. While looking at an old photo album of Isei's, Kiba sees a familiar sword being held by an old friend of Isei's, which reopen's old wounds. Meanwhile, Devils, Fallen Angels, and The Church's agents all clash to get their hands on, or just destroy, powerful weapons called Holy Swords. If that weren't enough, Isei's red dragon warns him that he senses his old rival the white dragon is drawing near.
The story follows Issei Hyōdō, a dim-witted, lecherous second-year high school student who is killed by a girl on his first date ever. Issei is reincarnated as a devil, and from that day forward, he serves as an underling of Riasu, a high-level devil who is also the prettiest girl on Issei's campus.
Infinite Stratos (IS), a weaponized exoskeleton system, has become the dominant tool of warfare and conflict. Unfortunately for the men in society, only women are able to operate Infinite Stratos…with very few exceptions. One of those exceptions is Ichika Orimura, an orphan raised by his older sister, who is herself a famous IS pilot. When his compatibility with Infinite Stratos is discovered after he accidentally touches one at the age of 15, he is given a scholarship and enrolled in a school that specializes in training IS pilots. Which means an interesting life surrounded by girls for this shy, unassuming boy.
Hino Akiharu lost his parents when he was small and was adopted into his uncle's family. But he noticed his uncle is after the inheritance of his parents, so he decides to enter a boarding school, Hakureiryou high school. However his delinquent boy-like appearance frightens the girls, who make up the majority of the students. Being unable to get along with the classmates, Akiharu meets his childhood girlfriend Saikyou Tomomi.
The Yūki's residence is now full of people: in addition to Rito and Mikan Yūki, Lala, her twin sisters Nana and Momo, and Golden Darkness. Momo, who also falls for Rito, actively tries to create a harem for him. Meanwhile, a mysterious red hair girl named Mea Kurosaki enters Sainan High School with a hidden agenda.
Walkure Romanze's story revolves around Takahiro Mizuno, a student studying at an academy with jousting as its main focus for sport. Takahiro acts as an advisor to the riders of the sport. Takahiro goes through each day tediously until the time of the annual competition draws near. Due to some odd circumstances, his childhood friend Mio Kisaki is enrolled into the competition. As she has never even rode a horse once in her life, Takahiro senses the fear in his friend and becomes Mio's coach.