Arita Haruyuki, a young boy whose chubby appearance and shy disposition makes him a constant target for school bullying.
Haruyuki, now a Burst-Linker, suddenly finds himself thrown into a deadly match against a vicious biker named Ash Roller.
A Duel Avatar called Cyan Pile is seeking to challenge Kuroyukihime in battle within Accel World.
Haruyuki suspects that Cyan Pile is challenging Kuroyukihime within Accel World via access through Chiyuri's neuro-linker.
The identity of Cyan Pile is revealed to be one of Haruyuki's closest peers, who has been consumed by the power to accelerate.
After Haru and Takumu reveal everything to Chiyuri, who doesn't take it too well, the two begin training to work as a tag team.
As Kuroyukihime suddenly challenges Takumu to a match, confronting him about his intention to quit kendo and eventually uninstall Brain Burst.
As Kuroyukihime's team attempts to claim more territories, Haru finds his tactics are becoming easily read by his opponents.
After discussing with Takumu, Kuroyukihime agrees to meet up with Tomoko, whose real name is Yuziko Kozuki.
After having another misunderstanding cleared up for her, Chiyu expresses and interest in becoming a Burst Linker.
Both Haru and Yuniko realize that Yellow Radio was the one responsible for the fifth Chrome Disaster, using a loophole in the non-aggression treaty as an excuse to eliminate her and reach Level 10.
The battle between Black Lotus and Yellow Radio is halted by the sudden appearance of Chrome Disaster.
Chiyu gets Takumu to install Brain Burst for her and becomes a Burst Linker, gaining the Duel Avatar, Lime Bell.
As Haru, Takumu and Chiyu discuss what exactly Seiji is, Takumu deduces the ability Seiji used was Physical Burst, which accelerates the user's consciousness, allowing them to react quicker.
Although Haru seemingly dominates the match to begin with, Seiji manages to trap him and use his Demonic Command ability to steal Haru's flight ability.
Raker explains to Haru that although he had lost his wings, he may be able to fly if he learns to use the 'incarnate system', which allows avatars to use certain powers through their will power alone.
As Haru contemplates how to go about facing Seiji, he receives a video call from Kuroyukihime, who mentions giving some information about Seiji to Takumu.
Over in Okinawa, Kuroyukihime is on her school trip with her friend Megumi.
Ruka and Mana introduce Kuroyukihime to their master, Crimson King, an old acquaintance of Kuroyukihime's.
Having been fully healed by Chiyu, Nomi makes short work of Takumu and defeats him in horrific fashion.
As they make their way to meet up with Yuniko, Haru explains to Takumu how Seiji had set him and Chiyo up.
Leopard decides to enter herself and Haru into a tournament to lure out Jigsaw, she also explains to Haru how overusing the incarnate system can bring him closer to darkness.
Haruyuki and Takumu set out for their final showdown with Nomi.
Silver Crow is determined to settle his score with Dusk Taker once and for all.