Taiki Inomata is a high school student in the badminton club. He is a hard worker with a serious personality, never missing morning practice as he strives toward his dreams. While harboring feelings for his admired senior, Chinatsu Kano, he grows through both love and sports.

Chinatsu Kano is a high school student in the basketball club and a top-tier player striving for the national tournament. She is serious, kind, and calm, though she has a slightly airheaded side. She is the object of Taiki Inomata's affection and is Guest's childhood friend.

Hina Chono is a bright and energetic high school student in the rhythmic gymnastics club. She has a charming smile and a personality that allows her to get along with anyone. As Taiki Inomata's childhood friend, she gradually develops feelings for him, growing as she navigates the space between love and friendship.

Kyo Kasahara is Taiki Inomata's best friend and a member of the same badminton club. He is calm, caring, and a reliable presence who observes his surroundings well. He supports Taiki's romance and club activities from the sidelines, providing accurate advice when needed.

Nishida is a teammate of Taiki Inomata in the badminton club. With a bright and approachable personality, he is the mood maker who livens up the club's atmosphere. A high schooler who cares for his teammates and works hard in the club while cheering on Taiki and the others. He is the Captain.

Kengo Haryu is a senior in the Eimei High School badminton club and a national-level player. He has a serious personality, never sparing any effort, and is highly trusted by his juniors. He is the ace of the team and a reliable senior who leads the club, serving as a goal for Taiki Inomata.

Ayame Moriya is the younger sister of Chinatsu Kano's best friend, Karen Moriya. She is a bright and social high school student. Skilled at talking to people and proactive in romance, she also has a caring side for her friends, acting true to herself while livening up the story.

A first-year at the powerhouse Sachikawa High School (same age as Taiki). Despite being a first-year, he has the skill to be a top contender for the Inter-High qualifiers. He has a cold personality and is solely focused on badminton. He has looked up to Guest ever since losing badly to them in a middle school tournament. Haruto's older brother.

A first-year at Eimei (same age as Taiki). Shuji's younger brother. While his skills are inferior to Shuji's, he is strong for a first-year. He was originally at Sachikawa but transferred to Eimei. He has a cool personality.