Bakuon!!

While taking a drive on the highway to try a "100-mile blend" of coffee, the girls stop by a service area, where they find cans of coffee with motorbike figurines included. Rin manages to obtain a figure of her Katana, only for it to get run over. Later on, everyone's bikes simultaneously break down due to an alleged curse, but they are soon aided by Raimu. Onsa becomes upset when she discovers the café serving the blend has been shut down, but Hane cheers her up with a can of coffee she had saved during their 100-mile journey. Afterwards, the girls enjoy a hot spring before returning to buy Rin a new figurine. An OVA of Bakuon!! bundled with the manga series' seventh complied volume.

After Hijiri finally obtains her own motorcycle license, she has one final ride with Hayakawa, who experiences mysterious rejuvenating effects and reverts to a younger age, revealing his true identity as a female maid. Confused by the circumstances, Hijiri attempts to hide Hayakawa's identity when the others come over to visit to see her new bike. Jealous of Hayakawa getting everyone's attention, Hijiri rides off on her own, only to run into some trouble when her bike topples over. Remembering that which is most important, Hayakawa returns to her normal appearance as an elderly butler to help Hijiri.

In the listing of special features for the Bakuon!! Blu-ray, “Bakuon's Closet Shorts” is named as a special / extra.

On her way to her first day of school, Hane Sakura takes interest in her classmate, Onsa Amano, after seeing her ride a motorbike to school. The two go to the school's Bike Club, whose only club member is a silent girl in a helmet named Raimu Kawasaki, who takes Hane for a ride on her Kawasaki ZX-12R. After joining the club alongside Onsa, Hane applies for a motorcycle license, initially struggle with lifting a bike but managing to pull it off after seemingly hearing a voice coming from her bike. During her lessons, Hane comes across another classmate, Rin Suzunoki, who takes her and the others to a bike shop to pick out a bike, only to argue with Onsa when she disses her taste in Suzuki bikes.

As Rin manages to get her bike license, she remains angry at Onsa over her prejudice towards her Katana, but is awed by Hane's honest compliments. Later, a freshman named Hijiri Minowa comes to join the bike club, giving Hane the idea to have Onsa and Rin settle their dispute with a chicken race. Though Onsa and Rin stop in order to keep their bikes safe, Hijiri and her butler Hayakawa go full force against Raimu. On the day of her license exam, Hane becomes nervous when she has to ride a different bike than from her lessons, but Hijiri and the others manage to cheer her on, allowing her to successfully pass her exam.

With Hane now having her license, the girls visit the Nicoichi Motors used bike store, which turns out to be Onsa's family business. Despite the poor condition of most of the bikes on sale, Hane decides to buy a pink Honda CB400SF Hyper VTEC Spec III that catches her eye. Later, the girls overhear Rin being cheerful after a microphone is installed in her helmet, encouraging her to join them on the trip. Afterwards, the girls learn that the Bike Club has been defunct for twenty years and look to getting it reapproved, while Raimu and Tazuko, the school's headmistress reminisce about how it came to be defunct in the first place. After Raimu promises to protect the other girls from harm, Tazuko presents Raimu with a new Student ID and has the Bike Club officially reinstated.