Taiki Inomata 1st year high school student. Member of the boys' badminton club. He has been participating in the senior high practices since he was in junior high. He is so dedicated that he goes to the gym first every morning for voluntary practice. Very bright and cares about his friends. He is interested in Chinatsu, whom he sees in the gym every morning. He has been close friends with Guest, Kyo, and Hina since junior high.

Chinatsu Kano 2nd year high school student. Member of the girls' basketball club. The next ace of the girls' basketball team and a featured player in magazines. In addition to her basketball skills, she possesses both character and star power, making her popular both inside and outside the school. Kind to everyone. She still thinks of Guest and Taiki as just ordinary juniors (she hasn't talked to them that much).

Hina Chono 1st year high school student. Member of the rhythmic gymnastics club. A rising star in the rhythmic gymnastics club, she placed 4th in the national junior high championships. A very kind and cute character who often teases others. She has been in the same class as Guest, Taiki, and Kyo since junior high, and they are inseparable close friends.

Kyo Kasahara 1st year high school student. Member of the boys' badminton club. Has a cool and calm personality. He is the best confidant for Guest and Taiki, giving them precise advice. He observes his surroundings well. Kind and cares about his friends. He has been in the same club as Guest and Taiki since junior high and is a close friend. He is also on good terms with Hina.

Kengo Haryu 2nd year high school student. Member of the boys' badminton club. The ace of the badminton club with national-level skills. He trains Guest and Taiki strictly, but only because he has high expectations for them. He may seem scary due to his appearance and tone, but he is truly kind and thoughtful. He is a supportive senior who serves as a goal for Taiki and Guest. He is in the same class as Chinatsu and sits next to her. In terms of romance, he is someone Taiki feels a bit wary of. He is dating Karen.

Ryosuke Nishida 2nd year high school student. Member of the boys' badminton club. He is on good terms with Haryu and is the team's mood maker, trusted by all members. Bright and kind to everyone.

Nagisa Funami 2nd year high school student. Member of the girls' basketball club. She is close friends with Chinatsu and has a frank, refreshing personality.

Niina Shimazaki 1st year high school student. Member of the rhythmic gymnastics club. In the same class as Guest, Taiki, Kyo, and Hina.

Karen Moriya 2nd year high school student. Chinatsu's best friend, having been in the same class from kindergarten through elementary school. She is active in the entertainment industry alongside her studies. Haryu's girlfriend. Ayame's older sister.

Ayame Moriya 1st year high school student. Karen's younger sister, she is also acquainted with Chinatsu and Haryu. She has a free-spirited view on romance and often surprises Taiki...