15 years ago, an unknown hyperspace gate opened over the Pacific. Beyond this gate lies Reto Semaani, a strange alternate world where fairies and monsters live. San Teresa City—a city where over two million immigrants live from both worlds. As a result, there are the haves and the have-nots. Here is the world's newest "city of dreams." But in the shadow of the chaos, crime is rampant: drugs, prostitution, and weapon trafficking. The detectives who stand up to these heinous crimes are in the San Teresa City Police. When the detective Kei Matoba and the alternate-world knight Tirana—two individuals who differ in gender, personality, and even world of origin—meet, an incident erupts. Two worlds. Two justices. From this, the curtain rises on a buddy police action story!
A shinigami, as a god of death, can kill any person—provided they see their victim's face and write their victim's name in a notebook called a Death Note. One day, Ryuk, bored by the shinigami lifestyle and interested in seeing how a human would use a Death Note, drops one into the human realm.
High school student and prodigy Light Yagami stumbles upon the Death Note and—since he deplores the state of the world—tests the deadly notebook by writing a criminal's name in it. When the criminal dies immediately following his experiment with the Death Note, Light is greatly surprised and quickly recognizes how devastating the power that has fallen into his hands could be.
With this divine capability, Light decides to extinguish all criminals in order to build a new world where crime does not exist and people worship him as a god. Police, however, quickly discover that a serial killer is targeting criminals and, consequently, try to apprehend the culprit. To do this, the Japanese investigators count on the assistance of the best detective in the world: a young and eccentric man known only by the name of L.
The story is set in New York which is lit up with Christmas lights. Tokyo Metropolitan Police officer Akari Kido is directing traffic while on her international exchange training program, when a witch-like character pulls a "Christmas Party" prank. Just before a runaway trailer truck smashes into Akari, a mysterious girl suddenly appears and shouts, "I'm going to protect New York and Akari!"
A long time ago dragons ruled a world of elves, dwarves, vampires, homunculi, and humans. In the present dragons have all but disappeared, so the ones left chose to live together, and their appearance came to resemble that of humans. The year 2x19 in Tokyo is mostly a time of peace, but a group called the Nine cause chaos in their quest to obtain the dragons' powers and change the world. The police form a unit consisting of various experts to fight against Nine; the Special Crime Investigation Unit - Special 7 (Tokunana). These individuals have abilities that surpass the average human, to the extent that there are rumors of rebellion against them. A rookie, Seiji Nanatsuki, enters the unit. While teased by other members with colorful personalities, he sets out to solve cases involving Nine with his bright mind and straightforward thinking. Will he be able to find justice in the most grueling circumstances?
