The year is 1996, and second-year high school students Haruo Yaguchi, Akira Oono, and Koharu Hidaka live their lives as passionately about video games as they were five years ago. Brought together by arcade games, what began as a healthy rivalry and friendship has turned into something more. As they endeavour towards understanding their unfamiliar feelings, they work with allies, navigate high school, and find that, although life has its many challenges, there's always a game or two they can rely on.

In Japanese folklore, a tsukumogami is an object that has gained a soul, becoming alive and self-aware. There are two types of tsukumogami: the mature tsugumomo, who have developed through long years of harmony with their owners, and the aberrant amasogi, premature spirits that are only born to grant the destructive wishes of certain people. Kazuya Kagami has never gone without his mother's obi after her death. Be it at home or school, he keeps it safe with him at all times. One day, he nearly loses his life when a wig amasogi attacks him. When all seems to be over, his treasured obi defends him, transforming into a beautiful girl. She introduces herself as Kiriha, a tsugumomo owned by Kazuya's mother. With Kiriha's arrival, Kazuya enters a reality he has never seen before, a world with gods and tsukumogami.

After failing their boss for the last time, yakuza members Kentarou, Ryou, and Kazuhiko are faced with one of two choices: have their organs harvested and sold or take a trip to Thailand for sex reassignment surgery and become pop idols. Now, after a year of excruciating training, the three thugs have been reborn as Airi, Chika, and Mari. Debuting as the amateur idol group The Goku Dolls, the three strive towards becoming top idols. However, despite the hours of feminizing brainwashing they were forced to endure, the three idols have managed to keep the yakuza spirit alive in their hearts. In order to fix this, their yakuza boss hires Mandarin Kinoshita, a legendary manager who has never had an idol group fail under his management. With their lives now on the line, the reluctant yakuza must work with their new manager to unleash their inner cuteness and become the successful idols that their tyrannical boss can truly be proud of.

After earning a series of difficult victories in the prefectures of Tochigi, Saitama, and Ibaraki, the drivers of Project D—an amateur street driving group led by ex-street driver and expert tactician Ryousuke Takahashi—Takumi Fujiwara and Keisuke Takahashi now have to take Project D to the next level: the Kanagawa prefecture, commonly known as the holy land of street racing. Their opponents, members of the three best street racing teams of Kanagawa, design an elaborate strategy called the Four Lines of Defense to put a definitive end to the ambitions of Project D. Meanwhile, Takumi feels he needs to refine his driving skills to overcome the last victory against Toshiya Joushima that he only just managed to snatch. The moment of truth has now come for Project D, which carries with it the hopes of the Gunma Prefecture; will they manage to thwart the surprising tactics of the skilled street racers of Kanagawa?