"BE BLUES!" is a sports manga centered around soccer, written and illustrated by Motoyuki Tanaka. The narrative revolves around Ryuu Ichijou, a talented young soccer player whose dream is to play for the Japanese national team and win the World Cup. Ryuu's journey begins in his childhood, where his passion for soccer is ignited by his father, a former professional player. Despite facing setbacks, including a serious injury that threatens his career, Ryuu remains determined to achieve his goals.

The story progresses through Ryuu's middle school and high school years, highlighting his growth as a player and his relationships with teammates and rivals. At Aomori Seiran High School, Ryuu joins the soccer team, which is struggling to regain its former glory. Alongside his childhood friend and teammate, Shun Aoi, Ryuu works to elevate the team's performance, facing formidable opponents in regional and national tournaments. The series emphasizes teamwork, perseverance, and the challenges of balancing personal ambition with collective success.

Key characters include Shun Aoi, a skilled midfielder and Ryuu's closest friend, who shares his passion for soccer but often serves as a contrasting figure in terms of personality and approach to the game. Other teammates, such as the hardworking goalkeeper Tatsuya Fujinami and the determined striker Kouhei Nagamine, contribute to the team's dynamics and growth. The series also explores the perspectives of rival players, coaches, and mentors who influence Ryuu's development.

"BE BLUES!" delves into the technical and strategic aspects of soccer, showcasing matches with detailed play-by-play sequences and tactical insights. The narrative balances on-field action with off-field struggles, including injuries, academic pressures, and interpersonal conflicts. Themes of resilience, ambition, and the pursuit of excellence are central to the story, making it a compelling exploration of the challenges and rewards of competitive sports.