A first-year high school boy. His birthday is January 5th. He is a member of the badminton club. He has a crush on Chinatsu. He is currently living with Chinatsu due to adult circumstances; specifically, Chinatsu is staying at Taiki's parents' house. He is polite and kind-hearted, and he stays on guard against other men getting close to Chinatsu.

A first-year high school girl. Her birthday is March 2nd. She is a member of the rhythmic gymnastics club. She is quite playful. She is Taiki's childhood friend and harbors a one-sided crush on him.

A second-year high school girl. She is polite, composed, and hardworking in everything she does. She is in the basketball club, and her birthday is August 26th. Since her parents went abroad, she has been staying at Taiki's house. She is a star athlete whose talent has been recognized in magazines; being both beautiful and kind, she is very popular.

A first-year high school boy. A member of the badminton club. He is one of Taiki's best friends and observes the romantic entanglements between Taiki, Chinatsu, and Hina.

A second-year high school boy. A member of the badminton club. He placed 3rd in the prefectural qualifiers during his first year. Despite being a sophomore, he possesses enough skill to beat out seniors for one of the two spots available to represent the prefecture at the Inter-High. He is in a relationship with Karen.

A first-year boy in the badminton club at Shimotomi High School. He was Haryu's doubles partner in middle school. He reportedly fell in love with Chinatsu after meeting her by chance at the Eimei High School festival a year ago.

A second-year high school girl. She works as a model. She is Kengo's girlfriend of the same age and is a childhood friend of Chinatsu, having attended the same kindergarten and elementary school.