Ichigo Kurosaki is a teenager gifted with the ability to see spirits. His life is drastically changed by the sudden appearance of a Soul Reaper —one who governs the flow of souls between the human world and the afterlife—named Rukia Kuchiki, who arrives in search of a Hollow, a dangerous lost soul. When Rukia is severely wounded defending Ichigo from the Hollow, she attempts to transfer half of her reiatsu (霊圧?, literally, "spiritual pressure") energy to Ichigo so that he can defeat the Hollow. However, Ichigo takes almost all of her energy, transforming into a Soul Reaper and allowing him to defeat the Hollow with ease. With her powers diminished, Rukia is left stranded in the human world until she can recover her strength. In the meantime, Ichigo must take over Rukia's role as a Soul Reaper, battling Hollows and guiding souls to the afterlife realm known as the Soul Society (尸魂界 (ソウル·ソサエティ),Sōru Sosaeti?).
As time passes and Rukia has yet to return to the Soul Society, her Soul Reaper superiors learn about her whereabouts and actions and sentence her to death for performing the illegal act of transferring her powers. Although he is unable to stop Rukia's departure to the Soul Society, Ichigo resolves to rescue her with the aid of several of his spiritually aware classmates, Orihime Inoue, Yasutora Sado, and Uryū Ishida, and the ex-Soul Reapers Yoruichi Shihōin and Kisuke Urahara. Once at the Soul Society, Ichigo and company battle against the elites of the Soul Reaper military and strive to reach Rukia before her execution.
It is revealed that Rukia's execution and Ichigo's rescue attempt both had been manipulated by a high-ranking Soul Reaper, Sōsuke Aizen, who was previously believed to have been murdered, as part of a far-reaching plot to take control of the Soul Society. Aizen betrays his fellow Soul Reapers and allies himself with the strongest of the Hollows, the Espadas. Aizen thus becomes the main antagonist of the series, and the Soul Reapers form an alliance with Ichigo. At this point, Bleach chronicles the war between the Soul Reapers, the Espadas, and Aizen. After each of the involved's eventual defeats, Ichigo undergoes intense training to become strong enough to battle Aizen alone. As Aizen is weakened, a spell that Urahara had previously hidden within him activates and seals him, thus ending the conflict and leaving the Soul Society to imprison him. As a result of using all of his Soul Reaper powers to defeat Aizen, Ichigo loses them and becomes a normal human.
Seventeen months later, a group of human individuals, called "Xcution", emerges. They possess Hollow-like powers that allow them to draw out the soul that dwells in any substance, and they desire to be rid of them. To achieve this, they approach Ichigo and inform him that they want to restore his lost Soul Reaper powers so that they may transfer their powers onto him.
Naruto Uzumaki is a young boy who has the Nine-Tailed Demon Fox sealed within him. Twelve years before the start of the series, the Nine-Tailed Demon Fox attacked the ninja village Konohagakure, slaughtering many people. In response, the leader of Konohagakure and its ninja military – the Fourth Hokage – sacrificed his life to seal the demon inside Naruto when he was a newborn. Konohagakure, however, regarded Naruto as if he were the demon fox itself and mistreated him throughout most of his childhood. A decree made by the Third Hokage, who replaced the Fourth Hokage after his death, forbade anyone mention the attack of the demon fox to anyone else. This included Naruto, who was not aware of the demon inside of him.
Years later, Naruto is tricked by the renegade ninja Mizuki into stealing a forbidden scroll, but he is stopped by his teacher, Iruka Umino. When Iruka almost dies while protecting Naruto from Mizuki, Naruto uses a Jutsu he learned from the scroll that creates multiple clones of himself, Shadow Clone Technique, to defeat Mizuki. This encounter leads Naruto to realize that he is the container of the demon fox.
The main story follows Naruto and his friends. Naruto befriends two comrades, Sasuke Uchiha and Sakura Haruno, who are assigned with him to form a three-person team named Team 7 under an experienced sensei named Kakashi Hatake. Like all the ninja teams from every village, Team 7 is charged with completing missions requested by villagers, such as doing chores or being bodyguards. During the course of their missions, Naruto befriends other characters that he meets throughout the series. Team 7 learns new abilities, get to know each other, and experience a coming-of-age journey as Naruto dreams of becoming the Hokage of Konohagakure.
After several missions, Kakashi allows Team 7 to participate into a ninja exam in which they can improve their ranks, and thus, take part in more difficult missions. During the exams, Orochimaru, a criminal at the top of Konohagakure's most wanted list, attacks Konoha and kills the Third Hokage in an act of revenge. This forces one of the three legendary ninja, Jiraiya to search for his former teammate Tsunade, who has been nominated to become the Fifth Hokage. During the search, it is revealed that Orochimaru desires to acquire Sasuke Uchiha due to his powerful genetic heritage. Believing Orochimaru will be able to give him the strength needed to kill his brother Itachi, who destroyed his clan, Sasuke goes to him in search of power. Tsunade sends a group of ninja including Naruto to make Sasuke return to Konoha, but Naruto is unable to defeat him and bring him back to the village. Naruto does not give up on Sasuke, however, and he leaves Konoha to train for two-and-a-half years under Jiraiya's tutelage in order to prepare himself for the next time he encounters Sasuke.
After the training period, a mysterious organization called Akatsuki attempts to capture the nine powerful tailed beasts including the Nine-Tailed Demon Fox sealed inside of Naruto. Several ninjas from Konohagakure, including Team 7, fight against the Akatsuki members and search for their teammate Sasuke. Although they manage to save Gaara the host of the One-Tailed beast, Akatsuki is successful in capturing seven of the creatures. In the meantime, Sasuke betrays Orochimaru and faces Itachi to take revenge. Although Itachi dies in battle, Sasuke is later told by the Akatsuki founder Madara Uchiha that Itachi was ordered by Konohagakure's leadership to destroy his clan. Saddened with this revelation, Sasuke joins forces with Akatsuki to destroy Konohagakure. Meanwhile, as several Akatsuki members are defeated by the Konohagakure ninja, their leader, Pain, invades the village to capture Naruto. However, Naruto defeats Pain's multiple bodies and convinces the real one to leave Akatsuki.
With Pain leaving, Madara announces that he wants to obtain the all nine of the tailed beasts in order to perform an illusion powerful enough to control humanity. All of the leaders of the five ninja villages refuse to aid him, and instead, join forces to confront him.
