With summer vacation coming to an end, the girls are having as much fun as they can with their remaining time. However, their daily shenanigans are cut short when Suguru Koshigaya wins the grand prize of a lottery—tickets to Okinawa! After hasty preparations, the Asahigaoka group embarks on a three-day trip for their final summer getaway. Upon arriving in Okinawa and checking into an inn, the group comes across Aoi Niizato—the young daughter of the inn's hostess. Despite being of similar age, her mature demeanor leaves Natsumi Koshigaya reflecting upon her own childish nature. With the sign of an unexpected friendship blooming on the horizon, the girls waste no time diving into their ambitious sightseeing plans and regional activities!

On Filiel's 15th birthday, she received her mother's necklace as a memento from her obstinate astronomer father. Her common and tedious life was turned into a life of conspiracies. With her new life, many adventures await. (Source: ANN)

On a sunny afternoon in her Paris apartment, assassin-for-hire Mireille Bouquet receives a strange email from Kirika Yuumura, a young student from Japan, inviting her to make a pilgrimage to the past together. Initially thinking the email is nonsense, she changes her mind when it begins playing a song that she recognizes from her youth. Upon first meeting each other in person, the two are suddenly ambushed by gun-wielding men. While Mireille is capable of fending off the assault, she discovers that Kirika is quite adept in combat situations after she takes out several gunmen on her own. Despite her proficiency at killing, Kirika laments her inability to feel remorse for her victims. In addition, Kirika apparently has no memory of how she came to acquire the skills she possesses or even of her real identity. Sensing shared history between them, Mireille agrees to team up with Kirika, and together, they embark on a journey to uncover the mysteries of their pasts. Operating under the codename Noir, the duo's fragile alliance is tested as they begin accepting jobs, each one bringing them closer to the truth of who they really are.

During their last summer of elementary school, four friends decide to undertake a test of courage at their local graveyard. Before the test begins, Haruka Kaminogi makes a last effort to pull Yuu Gotou away from his controlling mother. While doing so, Haruka suddenly has a strange vision of blue snow followed by the appearance of an imposing silver-haired man. Later, a similar vision occurs at the graveyard to both Haruka and her friends before they try to escape what they assume are ghosts. Unbeknownst to the children, the people who appeared before them are Dragon Soldiers: an elite military group from a dimension known as La'cryma. The soldiers have traveled to this dimension to secure the Dragon Torque—an entity they believe to be their last hope for survival. However, both the Dragon Soldiers and Haruka are shocked to learn that the Dragon Torque is Haruka herself. She attempts to escape from the Dragon Soldiers as she finds her own last ray of hope—the strange silver-haired man who claims to be another version of Yuu himself.