Seven Days War

When timid eleventh-grader and math genius Kenji Koiso is asked by older student and secret crush Natsuki to come with her to her family's Nagano home for a summer job, he agrees without hesitation. Natsuki's family, the Jinnouchi clan, dates back to the Muromachi era (1336 to 1573), and they've all come together to celebrate the 90th birthday of the spunky matriarch of the family, Sakae. That’s when Kenji discovers his "summer job" is to pretend to be Natsuki's fiance and dance with her at the birthday celebration. As Kenji attempts to keep up with Natsuki's act around her family, he receives a strange math problem on his cell phone which, being a math genius, he can't resist solving. As it turns out, the solution to the mysterious equation causes Oz, the program that controls nearly every aspect of life to be hacked into, it's up to Kenji and his new "family" to stop the hacker before it's too late.

Spring marks the start of another new school year at a junior high school in Kamakura. A new transfer student, Ryoichi Kyogoku joins the 8th grade. Kyogoku has a very special proficiency in telepathy and has been ordered by his father to use this ability to scan other people's minds and take over the school. He instantly gains popularity at school from his good looks and charisma and he sets about taking control of the school. As people begin to fall under Kyogoku's spell, he covertly manipulates his followers and pushes aside anyone who gets in his way. With the school almost completely under the control of Kyogoku, only one boy seems unaffected—Seki. Does Seki have what it takes to save everyone from the clutches of mind control?

During a summer camp, 15 children, 8 males and 7 females, find a grotto by the sea. Deep within they discover working computers and some electronic equipment, and later the owner, a man called Kokopelli. Kokopelli claimed to be a programmer working on a brand new game, in which a large robot has to defend the Earth against alien invasions. He persuades the children to test the game and sign a contract. All but one of them signs, barely a moment later they mysteriously awaken on the shore believing what happened was just a dream.

Misaki Yata is an energetic youth whose reckless and immature attitude has led him to be shunned by his classmates. Saruhiko Fushimi is a loner whose dysfunctional family, particularity his eccentric father, Niki, has led him to view the world in a pessimistic way. Despite being polar opposites, Yata’s enthusiasm eventually wins Fushimi’s trust, and the two become the best of friends. As time passes on, the two boys grow tired of being trapped inside their small world, leading them to set foot in the turbulent and dangerous world of the Dresden Slate…