From dusk until dawn, street racers gather on a Tokyo highway—the Wangan Route—in search of only one thing: speed. Among them, a newcomer attracts the attention of the route's veterans after he purchases a Nissan Fairlady Z, a car infamously nicknamed The Devil Z. The newcomer ignores the warnings of Eriko Asakura, who lost her brother, Akio, in an accident involving the same vehicle. The Devil Z's new owner, who coincidentally shares the exact same name as Eriko's brother, becomes bewitched by the car's mysterious power—even after crashing twice. Now a high school dropout who works to pay for his car repairs, Akio befriends regular street racers of the area: the legendary owner of the Porsche 911 Turbo, a car known on the streets as Blackbird; the genius surgeon Tatsuya Shima; and Reina Akikawa, who works as a model by day and displays unparalleled skill in her Nissan Skyline GT-R by night. Thanks to these connections, Akio manages to find the retired designer of The Devil Z's engine, a solitary man named Jun Kitami. Following his meeting with Akio, Jun resumes building overpowered yet dangerous engines. Meanwhile, the racers of the Wangan Route are caught in a desperate race against The Devil Z with no clear end in sight.

The Inuyama Family, along with their pet dog Tetsunoshin moves to the famous Hoppongi Hills (modeled after Roppongi Hills) from Kyushu. Rumi Inuyama's father owns an IT Company in Japan and is a step further to becoming number one. However, Tetsunoshin learned that his master's family loaned a lot of money renting their home in Hoppongi Hills, almost to the point of the whole company becoming Bankrupt. To make things even worse, the whole family spends a lot of money on everything, making Tetsunoshin's problems worse. To solve this problem, Tetsunoshin teamed up with the Hills Dogs and will do anything to pay all the Inuyama Family's expenses. (Source: Wikipedia)

A group of young boys (plus a token girl and her little brother, the obligatory brat) form a detective club, pooling their talents for brain, brawn, invention, and driving skills to solve crimes in Tokyo. Much to the consternation of police chief Nakamura, they often succeed where the professionals fail. (Source: The Anime Encyclopedia)

Each episode follows Fukuzou Moguro, a traveling salesman, and his current customer. Moguro deals in things that give his customers their heart's desire, and once his deals are made and their unhealthy desires are satisfied, Moguro's customers are often left with terrible repercussions, especially if they break the rules of his deals...