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.

After returning from a field trip, Yoshikazu Miyano—along with his friends—is ready to take over the Discipline Committee. But when a student loses their keychain, the now former chairman Masato Hanzawa uses this opportunity to create the First Lost Item Detective Squad in order to find the misplaced belonging. Amidst all this, Shuumei Sasaki is trying to determine how to define his relationship with Miyano going forward. Hoping to be helpful to Miyano, he joins the search party. Yet, even with Sasaki on board, the investigation remains unsuccessful. The group must continue to look everywhere and solve the mystery surrounding the keychain soon—as they discover that many more items have gone missing.

In A.G. 101 (the 101st year of the Advanced Generation calendar) a mysterious entity known only as UE, or unknown enemy, attacks and destroys the space colony Angel. This brutal attack becomes infamous as the The Day the Angel Fell, and marks the beginning of humanity's war for survival. The series begins in A.G. 108 when the UE attack the space colony Ovan, where Flit Asuno lives with his mother. Flit's mother is killed by the UE, and in her belongings (in an object called a AGE Device) he discovers the blueprints for a powerful weapon from the past - the ancient messiah named Gundam. From these blueprints, Flit spends the next several years studying engineering at an Earth Federation base on the Nora space colony and designing the AGE-1 Gundam. Seven years later, in A.G. 115, Flit completes the Gundam, just as the UE attack Nora. Flit and his lineage's battle piloting the AGE-1 to protect mankind is about to begin. (Source: GoodAnime.net)

OVA bundled with the special edition of the manga's side story.