Akira Tachibana is the protagonist of the story, a seventeen-year-old second-year student at Kazamizawa High School. She is a tall and slender young woman with long black hair and delicate facial features, possessing a quiet elegance and a refined presence that often draws attention. Before the events of the narrative, Akira was the ace of her school's track and field club, a talented sprinter with exceptional promise. Her life took a significant turn during the autumn of her first year of high school when she suffered a severe injury to her right Achilles tendon during practice, an event that forced her to give up competitive running.

Following her injury and subsequent surgery, Akira began working as a part-time waitress at a family restaurant called Garden. It is there that she meets Masami Kondo, the restaurant's forty-five-year-old manager. Her first encounter with Kondo occurs on a rainy day when she is feeling particularly dejected after a physiotherapy appointment; seeking shelter, she steps into the restaurant, and Kondo offers her a free cup of coffee. Akira is deeply moved by his simple, kind gesture during a moment of vulnerability, and this encounter becomes the catalyst for her developing romantic feelings for him. She soon decides to work at the Garden, which is located further from her home than necessary, as a way to be closer to him.

Akira is known for being reserved and soft-spoken, rarely showing her emotions on the surface. Her lack of expressiveness is often misinterpreted by those around her; her neutral expression can be mistaken for coldness or anger, and her manager even initially believes that she dislikes him. Despite this stoic exterior, she possesses a warm, kind, and caring personality. She is intensely earnest and sincere, particularly in her feelings for Kondo. In contrast to her typically quiet demeanor, Akira can be surprisingly direct and even aggressive when it comes to pursuing what she wants. This is most evident in her romantic pursuit of Kondo, where she takes the initiative to confess her feelings and is determined to make him aware of her affection, despite the significant age gap between them. She is also a responsible and hardworking individual, balancing her school studies with her part-time job, and she demonstrates a strong sense of responsibility.

Akira's role in the story is central, as the narrative follows her personal growth and the evolution of her feelings for Kondo. Her journey is not solely about romance; it is also about recovering from the loss of her identity as a star athlete and finding a new path forward. Her unfulfilled passion for running remains a significant undercurrent in her life. She is reluctant to visit her former teammates at the track or let them visit her at work, partly to avoid the painful memories associated with her injury. This creates a distance between her and her best friend, Haruka Kyan, who was also her captain on the track team and who feels a sense of guilt over the injury. Akira's character development involves her gradually confronting the trauma of her lost athletic career and learning to reconnect with that part of her life. Her relationship with Kondo, who is also at a personal crossroads as a divorced man in a stagnant job, serves as a vehicle for both characters to reflect on their situations and find motivation to move forward.

Several key relationships shape Akira's world. Her connection with Haruka is a poignant one, marked by unspoken feelings of loss and longing for the friendship they once had. At the Garden restaurant, she interacts with her cheerful and chatty co-worker Yui Nishida, who is unaware of Akira's deep feelings for their manager. The most important relationship is with Masami Kondo. While Akira sees his gentle, clumsy, and earnest nature as admirable, others often view him as weak or pathetic. Her persistence in the face of his hesitation and confusion forms the emotional core of the story. Akira also enjoys listening to music, particularly the band Kami-sama Kamacchan.

Before her injury, Akira's most notable ability was her exceptional talent as a sprinter, where she was known as the fastest runner on her team. Even after her injury, she demonstrates a quiet but strong resilience and a remarkable capacity for hard work, continuing to perform the physically demanding duties of a waitress without complaint. Her most defining ability, however, is her profound sincerity and courage in expressing her emotions, even when the situation is socially awkward or when she risks rejection, as seen in her direct confessions to Kondo.