"I have a duty to see everything that happens. No matter how much pain and sadness there is... Because I am Spearhead's handler." recaps the story told in through the perspective of Vladilena "Lena" Milizé—the commander of Shinei Nouzen and the Spearhead Squadron. [Written by MAL Rewrite]

Immortality is something many people would wish for. But would it be such a coveted ability if people knew they would be subject to countless attacks because of it? Such is the case for Rin Asougi, an immortal private investigator, because there is no shortage of people who want her dead. Over the centuries, she has met many grisly ends, but each time, she returns to life as if nothing had happened. In 1990, while looking for a lost cat, Rin runs into Kouki Maeno, a man who feels that his memories are wrong. Agreeing to help him, Rin discovers that Kouki is not what he seems, all the while drawing closer to her true enemy. This adversary knows Rin and her kind all too well, and if she dies by his hand, she may stay dead permanently. [Written by MAL Rewrite]

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.

[Written by MAL Rewrite]

A series of gruesome murders dubbed "New Generation Madness" once induced mass hysteria in Shibuya. At its peak during a frenzied riot, a sudden earthquake reduced the district into nothing but rubble, while leaving surrounding wards strangely intact. Six years later, in a newly rebuilt Shibuya, mysterious deaths begin to crop up again. It is not long before third-year student Takuru Miyashiro realizes a connection: the dates of the recent murders match those of the New Generation Madness incidents. He, along with several members of his school's newspaper club, decide to delve deeper into the mystery, only to find themselves stranded in the middle of a new crime scene themselves... [Written by MAL Rewrite]