TV-Series
Description
Tōma Tachibana is one of two central stepbrothers. His biological father, Eisuke Tachibana, remarried when Tōma was six, forming a blended family with Mayumi Sawai and her children, Sōichirō and Otomi. Tōma and Sōichirō coincidentally share the same birthday, with Tōma born ten minutes later, establishing the foundation for their close yet competitive dynamic.

Throughout childhood, Tōma and Sōichirō competed to become the primary pitcher. This role was ultimately decided by Tōma's exceptional pitching speed and a game of rock-paper-scissors, leading Tōma to become the pitcher and Sōichirō the catcher. In middle school, Tōma faced limited opportunities when the coach favored a less talented pitcher, Daisuke Nikaidō. After this situation resolved, Tōma secured the ace pitcher position in his final year and continued as the ace upon entering Meisei High School.

Tōma possesses a friendly, outgoing personality that naturally draws people in. This trait proved pivotal for Otomi after her biological father's death left her shy and fearful of strangers; Tōma's companionship and confidence helped her overcome these challenges. Consequently, Otomi relies heavily on Tōma, often preparing "special" versions of food for him and serving as his self-proclaimed "first fan," believing he "shines" when pitching. Their bond remains notably close, described as 'special' by narrative sources, though its exact nature evolves. Tōma dislikes Otomi's childhood nickname, "Tou-chan," yet performs at his best when she supports him.

His pitching talent extends beyond training; it is partially inherited. His late mother, Naoko Tachibana, was the ace pitcher of her softball team and a national tournament runner-up. Tōma never knew her well, as she died when he was three. An indirect connection exists through Haruka Ohyama, daughter of the Meisei High baseball coach; she and Tōma met at his mother's funeral when both were three. While Tōma retains no memory of this encounter, Haruka recalls it distinctly, including an incident where she punched him for being hyperactive and disrespectful during the somber event.

On the field, Tōma's development focuses on leading Meisei High toward the National High School Baseball Championship (Kōshien), a goal tied to the school's legacy and their fathers' unresolved ambitions. After entering high school, he forms a battery with Sōichirō. Their journey progresses through significant tournaments, including tense matches against rivals like Kenjō and Tōshū. During critical games, such as the quarterfinals against Kaiō Nishi and the semifinals against Tōshū, Tōma demonstrates strategic adaptability, occasionally shifting to left field to rest his arm while trusting the team's bullpen. The narrative follows their persistent efforts to advance through tournament stages across multiple seasons, aiming to reach Kōshien.