Koiso Kenji, a eleventh-grade math genius who works in the summer as a part-time computer technician for the Virtual World of Oz, is invited by Shinohara Natsuki, the most popular girl at his high school to her expansive family's home for a summer job. In the middle of their trip, a hacker infiltrates the network and takes control of Oz, plunging humanity into absolute chaos.

OZ, a virtual world connected to the internet, has become extremely popular worldwide as a spot for people to engage in a large variety of activities, such as playing sports or shopping, through avatars created and customized by the user. OZ also possesses a near impenetrable security due to its strong encryption, ensuring that any personal data transmitted through the networks will be kept safe in order to protect those who use it. Because of its convenient applications, the majority of society has become highly dependent on the simulated reality, even going as far as entrusting the system with bringing back the unmanned asteroid explorer, Arawashi. Kenji Koiso is a 17-year-old math genius and part-time OZ moderator who is invited by his crush Natsuki Shinohara on a summer trip. But unbeknownst to him, this adventure requires him to act as her fiancé. Shortly after arriving at Natsuki's family's estate, which is preparing for her great-grandmother's 90th birthday, he receives a strange, coded message on his cell phone from an unknown sender who challenges him to solve it. Kenji is able to crack the code, but little does he know that his math expertise has just put Earth in great danger.

After his parents died, Shinpei Ajiro lived with the Kofune sisters, Mio and Ushio, but he has since moved to live on his own in Tokyo. But after Ushio drowns while trying to save the young Shiori Kobayakawa, he returns home to mourn her departure. However, bruises around Ushio's neck bring her cause of death into question. Taking a step back, Shinpei becomes convinced there must be another explanation. Dangerous entities roam among the islanders, and a vision of deceased Ushio asks him to "save Mio" as her final request. He is certain that something is afoot—and Ushio's death is only a piece of the puzzle. With the help of Mio and various others, Shinpei struggles to forge a future in which he, his friends, and family can stay alive. But the more he investigates, the more impossible such a future seems. This darkness infiltrates his home island. Just how much more suffering will he go through before finding the right path to save it all?

Since the death of his parents, Shinpei Ajiro had lived with the Kofune family and their two daughters—Mio and Ushio. Although he then left his home island to continue his education in Tokyo, Shinpei returns after Ushio tragically drowns during the attempted rescue of a little girl. During the funeral, his best friend informs him about bruises found around Ushio's neck, casting doubt over the cause of her death. Suspecting a murder has taken place, Shinpei reevaluates recent events, but strange incidents only continue to transpire. Disappearing people and other unexplainable occurrences lead Mio to recall an old folktale referring to entities called "Shadows," which may not be entirely fantasy. Supposedly, an encounter with one's Shadow foretells the person's impending demise. Facing the dark side of Hitogashima Island, Shinpei stands against his grim fate to fulfill Ushio's final will—to protect Mio.

Momoko Kuzuryuu is a martial-arts crazed teenage girl who has grown up in the mountains with her father, a legendary fighter. However, one day her father tells her that because she is a girl, she will never be able to master the family’s ultimate technique. The only thing for her to do is go marry the strongest warrior, and produce the strongest offspring. Her unlikely fiance is the handsome but weak Koushi Inuzuka, the son of her father’s best friend and rival. Their marriage was agreed upon by their fathers before they were born. However, Koushi has no interest in martial arts; in fact, he is a coward who freezes whenever he sees violence. Instead, he wants to become a prosecutor, so that no criminal can escape capital punishment. Despite Koushi’s adamant refusal to marry her and his subsequent displays of cowardice, Momoko falls in love with him and swears to remain in his house and train with his father in order to become the strongest fiancee ever.

Mariko Rosebank leads a team of all-female anti-terrorist mercenaries, named C.A.T. This all-woman team is sent to guard a meeting of world leaders against a terrorist attack.

Shiina Aki is constantly being treated like a girl due to his feminine looks so he decides to move to Tokyo to attend middle school in an attempt to change himself. However, what awaits him in his new home, Sunohara-sou, is the kind-hearted caretaker, Sunohara Ayaka. Along with the three female members of Aki's new middle school's student council, Yukimoto Yuzu, Yamanashi Sumire, and Kazami Yuri. And so begins Aki's new life in Tokyo living with four girls.

Shiina Aki is constantly being treated like a girl due to his feminine looks so he decides to move to Tokyo to attend middle school in an attempt to change himself. However what awaits him in his new home, Sunohara-sou, is the kind-hearted caretaker, Sunohara Ayaka. Along with the three female members of Aki's new middle school's student council, Yukimoto Yuzu, Yamanashi Sumire & Kazami Yuri.

Collaboration commercials with Suntory and Kimi no Na wa.. The "Mitsuha no Omoi" (Mitsuha's Thoughts) commercial shows the character Mitsuha Miyamizu drinking SUNTORY Minami Alps Tennensui Yogurina, which is yogurt-flavored mineral water. The "Taki no Omoi" (Taki's Thoughts) commercial shows the character Taki Tachibana drinking SUNTORY Minami Alps Ten'nensui, which is mineral water. The "Kasanaru Omoi" (Overlap Thoughts) commercial shows both Taki and Mitsuha combining their thoughts through mixed dialogue with some alternative footage and a new song.

Ye Xingge, the heroine, is an intern of Rinshan entertainment. She has not yet officially started her career, but has been vilified by scandal, dismissed by the company and doubted by her boyfriend. And the last thing you expect is to wake up with a five-year-old son? Are you kidding me, kid? WHO's your mommy? And WHO's your father?

One last heist. That's what they all say, right? Just one final score, and everyone can retire and take up fishing. Thing is, the jails are filled with super villains who thought the same thing, and got busted. But the Heat's in a jam. He's run up the kind of gambling debt that - if he can't pay it back in cash - will be paid in blood. Nobody wants to see the most beloved supercrook of all time rubbed out by the mob - especially his biggest fan, Johnny Bolt. And Johnny's got a plan to help the Heat and make all his buddies disgustingly rich at the same time. Unfortunately for Johnny's recruits, they have to head to Spain and rob the world's most notorious super villain blind. And that's where things get tricky.

One last heist. That's what they all say, right? Just one final score, and everyone can retire and take up fishing. Thing is, the jails are filled with super villains who thought the same thing, and got busted. But the Heat's in a jam. He's run up the kind of gambling debt that - if he can't pay it back in cash - will be paid in blood. Nobody wants to see the most beloved supercrook of all time rubbed out by the mob - especially his biggest fan, Johnny Bolt. And Johnny's got a plan to help the Heat and make all his buddies disgustingly rich at the same time. Unfortunately for Johnny's recruits, they have to head to Spain and rob the world's most notorious super villain blind. And that's where things get tricky.