Koyuki hangs out with Ryusuke and finds out more about music, and meets his sister, Maho, who later takes Koyuki to see Beck, her brother's dog.

While Koyuki takes his first tentative steps toward learning guitar, Maho suggests that he'd be the perfect lead vocalist for Ryusuke's new band. But an accident threatens to shatter Ryusuke and Koyuki's friendship forever, as well as putting an end to Koyuki's musical aspirations-until help comes from a very unexpected source.

Koyuki's guitar training is coming along slowly but surely, until Saitou decides to speed things up by entering him to play in the annual summer festival! Meanwhile, Ryusuke and Chiba put their heads together to come up with a name for their new band.

Taira, the newest member of Beck and the others have their first session together to start the band off on a good note. Koyuki's teacher is on maternity leave and a new cute teacher is introduced. As coordinator of the choir contest, she wants Koyuki to be the leader for the class to get them ready for the contest.

Koyuki tries to memorize the scales at Saitou's place. Later we can see Koyuki talking with the bullies and then scolded in the teacher's office. Maho meets with him, and at Saitou's place, Koyuki tells her why he started to work for the old man. This marks the first appearance of Ryusuke's guitar, "Prudence" ("Lucille" in the Japanese original), notable for the several bullet holes it bears.

Koyuki visits an instrument shop and practices some more. The school year ends. Next Momoko meets Koyuki accidentally going in Saitou's place and decides to go with him to check whether he works there. Koyuki tries to sell off Saitou's pornographic magazines.

Koyuki and Saku become friends. Koyuki gets nominated for the most difficult swimming races in the school's competition. Koyuki takes Saku to see Beck's show.

Koyuki and Saku become friends. Koyuki gets nominated for the most difficult swimming races in the school's competition. Koyuki takes Saku to see Beck's show.

The band tries to raise some money and Chiba finds out that Dying Breed is coming to Japan. Later on Koyuki talks to a teacher about his decreasing grades. Momoko asks the band to enter the school festival.

Dying Breed performs in concert live in Japan, with Koyuki unexpectedly guest singing. Later on, Koyuki and Izumi meet again and she invites him for night-swimming, much to Maho's chagrin when she finds out. Meanwhile, Ryusuke finds out that somebody close to him has died.

Mitty brings the cover design for the Beck band logo. Izumi meets up with Maho to clear the misunderstanding between them. During practice there's some tension between band members, who are pressured by the recording of the new album. But to make things worse, Koyuki has a fever and thinks he's holding back the band. Koyuki loses consciousness sometime during the night and dreams a star-studded vision of his first concert.

Gordie comes to see Eddie about the stolen stuff including Prudence. Then Eddie and Ryusuke talk about it on the phone. Koyuki still works hard to earn cash for the Telecaster and we can see a girl who works next door for the second time. At school, Tanaka finds out that one of Maho's friends is quite famous. Beck performs and is heard by Chicagoan records agent, named Frank Albin, allowing for a possible big break.

Ryusuke wants to release Beck's album in America. Koyuki finally buys the Telecaster. Koyuki sees at school the same girl, named Hiromi, who he saw in the doughnut store next to his workplace. Later at Saito's place Koyuki finds out that he's dating Momoko. Ryusuke learns that Beck's album is already selling in America, and we learn about Prudence and her history.

Koyuki talks with his boss about his band. Saku then joins Koyuki at Saito's swimming practice. Beck is allowed to perform at the Marquee's evening show as Hitode's support, because the manager really liked Koyuki's singing. Maho meets with record company executives. Ryusuke gets the American version of the band's record, and is utterly dissatisfied with the cover art because it depicts him playing Prudence, knowing the consequences that single picture would bring. Leon Sykes comes to Tokyo, and his first act there is cornering Ryusuke at his own house by the fishing pond.

Ryusuke (along with Beck and Prudence) get kidnapped by Sykes, who takes him to meet his uncle, the bluesman John Lee Davis, who wanted to know who had stolen Prudence. Upon meeting Davis, one of his musical inspirations, Ryusuke has a jam session which overwhelms his idol, so much so he convinces Sykes not to kill him. So, four days after his kidnapping, Ryusuke is returned, badly beaten, but alive (but Sykes keeps Beck and Prudence with him). As he asserts the situation to Taira and Chiba, Koyuki and Saku, who were looking after the fishing pond for Ryusuke, are visited by one of the managers of the Greatful Sound Festival, Kazuo Sato, who is ecstatic to meet Koyuki after seeing him sing in the Dying Breed's tour movie. Koyuki later gets the chance to see himself on the silver screen, along with Maho.

The band tries to improve the new song and Koyuki tries to write the lyrics, at Ryusuke's request. Saito tries to help Koyuki come up with some lyrics. Surprisingly for him, the lyrics written by Saito are much more well received than those he wrote himself, so much so Ryusuke rewords the song in English. The band later departs for the Greatful Sound grounds, where they will perform on the smallest of the three stages. Ryusuke reveals Sykes' conditions to Chiba and Taira: he will have the rights over the band's next releases, as well as the promotion over the band. Ryusuke also reveals that he, in turn, established one condition on his own: Sykes will have to leave the theft of Beck and Prudence, if the band gets the highest attendance of the festival. Koyuki and Yoshito make a bet: if Maho comes to see Yoshito, then Koyuki must give up on her. Koyuki later is approached by a foreign band to perform for them, but the performance goes awry because of his inability with English and he is booed off the stage.

Koyuki plans to revive Beck and sets out to get the band together. After talking to Chiba and Taira and getting them to join, Saku finally makes his way back to town to join up with the others and the band is finally back together (except for Ryusuke, who is making a living as a street musician in New York City when John Lee Davis approaches him offering help in anything he might need). Great news comes in the form of an invitation to tour with a band in the United States of America, and along the way they end up meeting Ryusuke again at Seattle. Leon Sykes also gets arrested. Beck plays a gig, all of them including Ryuusuke, their future is told in the manga (which also chronicles the lead-up to the US Tour in more detail).