Kondo Isami, a third-year high school student, has good grades but he is forced to decide which path to take because of his family’s financial situation. One day, he learns about the government-affiliated Defence Academy where students are not only exempt from admission fees and school fees, but are given an allowance every month. He wishes to go to this academy. After graduating from high school, Kondo enters the Defence Academy and meets Matsuhira Yosuke, Okita Soji, Harada Tadashi and Takei Tomoaki who become friends. He takes the first step to a new life, but when the entrance ceremony ends, the attitudes of the senior students including Sakaki Ryuya and Nishiwaki Takashi change drastically and strict coaching begins.

After the massacre in Ukishima, Saya loses her memory and wanders the slums until she meets Haru, an unlicensed doctor, and Ran, the girl who hunts the Elder Bairns. As her memory returns, she discovers that she had relationships with them both in the past, and secret promises made by the Nanahara clan and her nemesis, Fumito. As Sayo tries to rescue kidnapped Haru, she encounters Fumito again. This feature untold story in the time period between the 2011, 12-episode TV anime created by Production I.G and Nanase Ohkawa (CLAMP), and its feature film sequel Blood-C: The Last Dark in 2012.

Nao Yoshino is a girl who fails the entrance exams of her target high school. She winds up enrolling in a technical high school called Kenritsu Asuka Kōgyō Kōkō, also known by the nickname "Asukō". Out of the 148 entering freshmen, only three are girls, and Nao is the only one in her class.

Akari Dojima (Yukie Nakama), an illustrator, is the third daughter of Chairman Dojima, the head of a construction company. During her childhood, she had an accident which left her crippled and forced her to spend her life in a motorized wheelchair. The sudden suicide of Akari's father sets off a chain of events. Members of Dojima family and their servants are killed one after another and an investigation begins. After that, the body of their driver (Kitaro), who had hung himself, is found in the garage...

Asako, a comic book artist in her early forties, is devastated by the death of her precious cat, Saba, which kept her company for over 15 years, as her assistant Naomi watches on with concern. Naomi is a young woman in her early twenties, who has her set of worries about love and future. Then one day, Asako meets a new cat, Gu Gu, which brings new joy and vitality to her life. What is more, she finds potential for love in a man named Seiji. Like Asako, Naomi, too, embarks on a new life plan.