Owing to an increasing debt, Kaiji Itou ends up resuming his old lifestyle. One day, while walking on the street, he stumbles upon Yuuji Endou, who is hunting Kaiji due to the money he owes to the Teiai Group. Unaware of this, Kaiji eagerly follows Endou, hoping for a chance to participate in another gamble, but soon finds out the loan shark's real intentions when he is kidnapped. Given that Kaiji is unable to pay off his huge debt, the Teiai Group instead sends him to work in an underground labor camp. He is told that he will have to live in this hell for 15 years, alongside other debtors, until he can earn his freedom. His only hope to put an early end to this nightmare is by saving enough money to be able to go back to the surface for a single day. Once he is there, he plans to obtain the remaining money needed to settle his account by making a high-stakes wager. However, as many temptations threaten his scarce income, Kaiji may have to resort to gambling sooner than he had expected. [Written by MAL Rewrite]

Chihaya Ayase, a strong-willed and tomboyish girl, grows up under the shadow of her older sister. With no dreams of her own, she is contented with her share in life till she meets Arata Wataya. The quiet transfer student in her elementary class introduces her to competitive karuta, a physically and mentally demanding card game inspired by the classic Japanese anthology of Hundred Poets. Captivated by Arata's passion for the game and inspired by the possibility of becoming the best in Japan, Chihaya quickly falls in love with the world of karuta. Along with the prodigy Arata and her haughty but hard-working friend Taichi Mashima, she joins the local Shiranami Society. The trio spends their idyllic childhood days playing together, until circumstances split them up. Now in high school, Chihaya has grown into a karuta freak. She aims to establish the Municipal Mizusawa High Competitive Karuta Club, setting her sights on the national championship at Omi Jingu. Reunited with the now indifferent Taichi, Chihaya's dream of establishing a karuta team is only one step away from becoming true: she must bring together members with a passion for the game that matches her own.

As a child, Moritaka Mashiro dreamt of becoming a mangaka, just like his childhood hero and uncle, Tarou Kawaguchi, creator of a popular gag manga. But when tragedy strikes, he gives up on his dream and spends his middle school days studying, aiming to become a salaryman instead. One day, his classmate Akito Takagi, the school's top student and aspiring writer, notices the detailed drawings in Moritaka's notebook. Seeing the vast potential of his artistic talent, Akito approaches Moritaka, proposing that they become mangaka together. After much convincing, Moritaka realizes that if he is able to create a popular manga series, he may be able to get the girl he has a crush on, Miho Azuki, to take part in the anime adaptation as a voice actor. Thus the pair begins creating manga under the pen name Muto Ashirogi, hoping to become the greatest mangaka in Japan, the likes of which no one has ever seen. [Written by MAL Rewrite]

Gorou Honda has finally returned to Mifune East Junior High School, surprising his friends upon arrival. Now, Gorou is once again surrounded by those he holds closest, and he strives to continue playing and enjoying the game he loves most. However, things do not go as planned, as Gorou is reminded of the harsh realities of baseball as he copes with an injury he sustained while playing baseball at Hitaka Little. Between new rivals, old friends, and mending broken relationships, Gorou must overcome challenges he has never faced before. His goal of attending elite baseball high school Kaido may not be far from his reach, but complicated circumstances may stop him in his tracks once again. How will he deal with the immense pressures of the game? And will he ever be able to find the type of baseball he loves most? [Written by MAL Rewrite]