Aslan Jade Callenreese, known as Ash Lynx, was a runaway picked off the streets of New York City and raised by the infamous godfather of the mafia, Dino Golzine. Now 17 years old and the boss of his own gang, Ash begins investigating the mysterious Banana Fish—the same two words his older brother, Griffin, has muttered since his return from the Iraq War. However, his inquiries are hindered when Dino sends his men after Ash at an underground bar he uses as a hideout. At the bar, Skip, Ash's friend, introduces him to Shunichi Ibe and his assistant, Eiji Okumura, who are Japanese photographers reporting on American street gangs. However, their conversation is interrupted when Shorter Wong, one of Ash's allies, calls to warn him about Dino. Soon, Dino's men storm the bar, and in the ensuing chaos kidnap Skip and Eiji. Now, Ash must find a way to rescue them and continue his investigation into Banana Fish, but will his history with the mafia prevent him from succeeding?

Seishuu Handa is an up-and-coming calligrapher: young, handsome, talented, and unfortunately, a narcissist to boot. When a veteran labels his award-winning piece as unoriginal, Seishuu quickly loses his cool with severe repercussions. As punishment, and also in order to aid him in self-reflection, Seishuu's father exiles him to the Goto Islands, far from the comfortable Tokyo lifestyle the temperamental artist is used to. Now thrown into a rural setting, Seishuu must attempt to find new inspiration and develop his own unique art style—that is, if boisterous children (headed by the frisky Naru Kotoishi), fujoshi middle schoolers, and energetic old men stop barging into his house! The newest addition to the intimate and quirky Goto community only wants to get some work done, but the islands are far from the peaceful countryside he signed up for. Thanks to his wacky neighbors who are entirely incapable of minding their own business, the arrogant calligrapher learns so much more than he ever hoped to.

Above a nondescript kitchen counter quietly hangs a bunch of ripe, yellow bananas. Suddenly, one of the slender fruits begins to shake, gently at first but slowly increasing in ferocity until it tears itself away from the rest. With a graceful landing, the long and curvy edible gradually rolls back its golden peels, revealing what lies beneath its firm covering to be something unexpected: a cat! This mysterious feline-fruit hybrid is named Bananya. Carefree and gentle, the adorable creature dreams of one day becoming a luscious bananya bathed in chocolate. Together with his fellow bananya, this kitten cloaked in yellow passes its days without a care in the world, enjoying a rather calm and peaceful existence as it experiences what the world has to offer.

Ryouma Sakamoto wants everyone to know about his passion for rock 'n' roll, so he roams around town with his electric guitar willing to show anyone he encounters that he's just as skilled as the famous Shinsengumi stars they admire. Unfortunately, Japan doesn't allow anything other than that group's Heaven's Songs, for writing or performing different types of music is forbidden and can lead to harsh consequences. Agitated by these strict rules and brainwashing, Ryouma does everything he can to show people that the music he loves will bring them the freedom they deserve. Along with his bandmates Shinsaku Takasugi and Kogoru Katsura, Ryouma works hard to find places for his rock 'n' roll group to perform. Refusing to back down until their music is accepted in Japan, the trio begin to realize that there's more to their passion than they had thought.