Takumi Fujiwara is the son of the owner of a local tofu shop. At night, Fujiwara gets in his souped up AE86 Sprinter Trueno (AE86 Corolla GT(DOHC)) and races on the seldom-used Japanese mountain roads. One night, the Akagi Red Suns team, a racing club, challenges the Akina Speed Stars to a race on the mountain where Fujiwara lives. Keisuke, one of the leaders of the Red Suns, races his legendary Mazda RX-7 - only to be beaten by the mysterious Fujiwara.

Takumi Fujiwara and brothers Keisuke and Ryousuke Takahashi have formed "Project D", a racing team aimed at bringing their driving skills to their full potential outside their prefecture. Using the internet, Project D issues challenges to other racing teams and posts results of their races. Managed by Ryousuke, the team has Takumi engaging in downhill battles with his AE86, while Keisuke challenges opponents uphill. Among their rivals are the Seven-Star Leaf (SSR) and Todo-juku.Meanwhile, Takumi is caught off-guard on Mount Akina when he encounters his father Bunta and his newly acquired Subaru Impreza WRX Type R Version V.

Following his victory over RedSuns leader Ryosuke Takahashi, AE86 driver Takumi Fujiwara is challenged by the Lancer EVO-based "Emperor," a group known for taking decals of racing teams they defeat, cutting them up and placing them on their cars like a fighter plane kill board. Takumi's undefeated streak is on the line as his AE86 is virtually no match against the more powerful and more agile four-wheel-drive EVOs of the Emperor team.

Shortly after graduating from high school, Takumi is approached by RedSuns leader Takahashi Ryousuke and offered to join him in forming a professional racing team. Before coming up with an answer to the proposal, Takumi seeks retribution by issuing a rematch to Emperor leader Sudou Kyouichi, who previously defeated him due to an engine failure. He is also challenged by Kogashiwa Kai, a second-generation street racer whose father was once a fierce rival of Takumi's father Bunta.

Five budgies meet every day in a club to help other birds.

In the year 2010 AD hyper hurricanes devastated large parts of the Earth, with a death toll of over five billion humans. The well-established global economy and powerful military organizations were wiped out. North America, Russia, and Northern Europe are now covered by glaciers; large land masses sank in the oceans — the world's topography dramatically changed, with humanity on the brink of extinction, and civilization in utter chaos. The Japanese government created special economic areas which have achieved a limited degree of recovery after the disaster. Powered Assist Technology, which had long been under study, played an important role there restoration efforts. However, outside of these economic zones, in the surrounding slums, there is widespread poverty. The ruling class calls themselves Logos and maintains its position by force of arms, making full use of the Powered Assist Technology in their military. They call the poor Revenus, who are exiled to live outside the special economic areas.Time has passed since then. Katsuragi Jou and Tsurasawa Jin, escape from Phantom — a special unit created by Logos to keep the Revenus in check, and to hunt down renegade elements — taking with them a mysterious girl, Nobuto Sana. There are many factions interested in her, and so Jou and Jin face continued opposition protecting Sana, and the unspeakable secret connected to her past.

In the year 2010 AD, Hyper Hurricanes born concurrently all over the world caused severe damage. Five billion people lost their lives, decreasing the world's population to 3 billion. Existing economies and military were wiped out. Countries were frozen under solid ice, plains sank beneath seas, the world was changed dramatically. Human civilization enters a chaotic era. Poverty flourished outside of these economic zones and slums were widespread. The ruling class called themselves Logos and maintained their position by force of arms. They call the poor Revenus, who are exiled to live outside the special economic areas. Time has passed since then. Katsuragi Jo and Tsurasawa Jin, escape from Phantom, a force organized to watch Revenus and to suppress renegade elements of the Logos, taking with them a mysterious girl, Nobuto Sana. There are many who are interested in her, all with their own reasons.

The anime follows a group of friends Giulia, Maria, Enrico, Lucio and Angelon during the disaster as they team up with a Japanese journalist Shiro Ando, and begin their own investigation of what's occurring (during the week long period of exposure when the ICMESA refused to notify citizens of the poison). As many animals are dying and people are getting sick. The children and Shiro discover deadly dioxin was released and inform Enrico's father, the town mayor, who evacuates all the citizens. Shiro continues investigating more and learns of the negligence of La Roche, a company who controls ICMESA. La Roche knew they were in violating of existing safety laws/protocols and destroyed evidence of their crimes. The children attend a press conference to ruin La Roche's reputation as the destroyed proof might not be enough in a court of law to punish them. Giulia's pregnant sister, who opted to not abort, gave birth to a healthy girl. The happiness is short lived, as the baby prematurely dies from dioxin poisoning.

The five members of the literature club awakened with extraordinary powers half a year ago. Although the members expected to be thrown into a world of super-powered battles (inou-battle) at their school, their normal daily routine continued. No secret organizations bent on world destruction, no super-powered wars, no braves or demon kings. However, the members still look forward to the possibilities of adventure, and continued to believe that with each day, they were getting ever closer to those days of fantasy. Their days of romantic comedy and battles with extraordinary powers begin!

During a Literature Club meeting, the four club members—along with their faculty adviser's niece—suddenly find themselves with supernatural powers. Now capable of fabricating black flames, resident chuunibyou Jurai Andou is the most ecstatic about their new abilities; unfortunately, his own is only for show and unable to accomplish anything of substance. Moreover, he is completely outclassed by those around him: fellow club member Tomoyo Kanzaki manipulates time, Jurai's childhood friend Hatoko Kushikawa wields control over the five elements, club president Sayumi Takanashi can repair both inanimate objects and living things, and their adviser's niece Chifuyu Himeki is able to create objects out of thin air. However, while the mystery of why they received these powers looms overhead, very little has changed for the Literature Club. The everyday lives of these five superpowered students continue on, albeit now tinged with the supernatural.

The unnamed main character has been having strange dreams, seeing strange things, and meeting strange people. He investigates these events and finds a strange girl named Aya. With her help, he discovers that his world may not in fact be real and many of the people he thinks he knows may not exist anymore.

The unnamed main character has been having strange dreams, seeing strange things, and meeting strange people. He investigates these events and finds a strange girl named Aya. With her help, he discovers that his world may not in fact be real and many of the people he thinks he knows may not exist anymore.