After witnessing the race between Takumi Fujiwara's Toyota AE86 and Keisuke Takahashi's Mazda RX7, Takeshi Nakazato from the Myougi Night Kids sends out a challenge to defeat the AE86 in a downhill battle. Despite his Nissan Skyline GT-R completely outclassing the AE86, Nakazato is told that he will never beat Takumi—a statement that enrages him. Believing that grip racing is far superior to flashy drift racing, Nakazato is dead set on defeating the AE86 to prove that he is the better racer. Thanks to Itsuki Takeuchi's hasty acceptance of the match on his behalf, Takumi is reluctant to get involved with the challenge and chooses not to race, stating that he is not a racer by any means. Overseeing the dilemma, Takumi's employer goads him into accepting. However, when Takumi returns home to get the AE86, he finds that his father has taken the car out for himself. As he waits for his father's return, Takumi begins to feel his itch to race grow ever more.

Yato and Yukine have finally mended their relationship as god and Regalia. As a minor and unknown deity, Yato continues to take odd jobs for five yen apiece in hopes of one day having millions of worshippers and his own grand shrine. He has yet to fix Hiyori Iki's loose soul, but she cheerily prepares for high school nonetheless. While things are seemingly back to normal, the complicated history between Yato and Bishamon—goddess of war and warriors—resurfaces. Bishamon holds a mysterious old grudge against Yato, which results in violent clashes between them. To further complicate matters, Bishamon's most trusted Regalia, Kazuma, is indebted to Yato. When lives are on the line, unraveling these secrets is possibly the only way to correct mistakes of the past.

In times of need, if you look in the right place, you just may see a strange telephone number scrawled in red. If you call this number, you will hear a young man introduce himself as the Yato God. Yato is a minor deity and a self-proclaimed Delivery God, who dreams of having millions of worshippers. Without a single shrine dedicated to his name, however, his goals are far from being realized. He spends his days doing odd jobs for five yen apiece, until his weapon partner becomes fed up with her useless master and deserts him. Just as things seem to be looking grim for the god, his fortune changes when a middle school girl, Hiyori Iki, supposedly saves Yato from a car accident, taking the hit for him. Remarkably, she survives, but the event has caused her soul to become loose and hence able to leave her body. Hiyori demands that Yato return her to normal, but upon learning that he needs a new partner to do so, reluctantly agrees to help him find one. And with Hiyori's help, Yato's luck may finally be turning around.

In the one-of-a-kind samurai-general-reincarnated-as-a-canine comedy, Nobunaga perishes at Honnouji as in history, and reincarnates in modern-day Japan as a dog named Shinamon. Other Warring States era warlords such as Takeda Shingen eventually join him, also as dogs. (Source: ANN)