"Mix" is a sports manga series written and illustrated by Mitsuru Adachi, serialized since 2012. The story is set in the same universe as Adachi's earlier work, "Touch," and takes place approximately 30 years after the events of that series. The narrative centers around two stepbrothers, Touma and Souichirou Tachibana, who attend Meisei High School, a school with a storied baseball history. Their father, a former professional baseball player, remarried after the death of his first wife, bringing the two families together. Touma, the older brother, is calm and analytical, while Souichirou, the younger, is energetic and passionate. Both share a deep love for baseball and aspire to follow in their father's footsteps.

The brothers' journey begins with their decision to join the school's baseball team, which has fallen from its former glory. The team struggles with a lack of resources and motivation, but the Tachibana brothers, along with their childhood friend Otomi, the team manager, aim to revive Meisei's baseball program. Otomi, who is also their stepsister, plays a crucial role in supporting the team and maintaining the brothers' morale. The narrative explores their efforts to improve their skills, build team cohesion, and compete in high school tournaments.

As the story progresses, the brothers face various challenges, both on and off the field. Their relationship is tested by rivalries, personal insecurities, and the pressure to live up to their father's legacy. The series delves into themes of family, perseverance, and the pursuit of dreams, all set against the backdrop of competitive high school baseball. The brothers' interactions with teammates, rivals, and coaches add depth to the narrative, highlighting the camaraderie and rivalries inherent in sports.

"Mix" also incorporates elements of romance, particularly through the dynamics between the brothers and Otomi, whose presence adds emotional complexity to the story. The series balances its sports action with character-driven moments, creating a well-rounded narrative that appeals to fans of both sports and slice-of-life genres. Through its focus on the Tachibana brothers' journey, "Mix" captures the essence of high school baseball while paying homage to the legacy of Adachi's earlier work.