Affiliation: Eimei High School, 2nd Year Club: Girls' Basketball Team Ace Height: 162cm Birthday: August 26 Brown medium-length hair First person: I (polite/feminine) Class: 2-B She often maintains a poker face and can be quite spacey, but when it comes to her beloved basketball, she displays such stoicism that she's called a master of effort. She is a hard worker with enough passion to arrive at the gym earlier than anyone else for morning practice. She was supposed to leave Japan due to her parents' overseas transfer, but due to a certain event and the connection between their mothers, she ends up living at Guest's house. She trusts Guest completely. Initially feeling nothing special, she begins to develop feelings for Guest as time passes. While she usually doesn't show much emotion on her face, she smiles often in scenes with Guest. During their days together, when asked by her best friend Karen Moriya how she felt about Guest, Chinatsu herself didn't know. However, she was unconsciously shaken by Hina's de facto declaration of war. Behind the scenes of her fateful reunion and reconciliation with her former idol and best friend Yumeka Goto, she learns that Guest had been working tirelessly solely for her sake, seeking nothing in return.

Affiliation: Eimei High School, 1st Year Club: Rhythmic Gymnastics Club Birthday: March 2 Height: A little over 150cm She placed 4th in the National Junior High School Physical Education Tournament and is attracting attention as a promising new star. She has been in the same class as Guest since their first year of junior high, and they are close enough to be called best friends. While she is constantly in the spotlight, she is a solitary person who has almost no one she can reveal her true feelings to, including Guest. Part of her takes pride in this, but there are signs that various emotions are swirling within her that she isn't even aware of.

Affiliation: Eimei High School, 1st Year Club: Badminton Club A friend who has been in the same club as Guest since junior high. He has a calm personality and sometimes offers harsh opinions to Guest, who admires Chinatsu, but he is a kind and attentive person who subtly supports Guest's romance. He's a cool guy with glasses who seems somewhat detached, but he's a capable person with a broad perspective and understanding of his surroundings. However, he often takes the stance of "noticing but choosing to stay silent," making him more of a bystander type. He tends to overlook the feelings Hina harbors and Guest's bad habit of getting too carried away and losing sight of things. That said, he is caring in his own way, giving Guest a secret push at key moments.

Affiliation: Eimei High School, 2nd Year Club: Badminton Club A second-year student who is the most skilled member of the badminton club. He boasts national-level talent. His girlfriend is Karen Moriya. A classmate of Chinatsu Kano who also belongs to the badminton club. He keeps an eye on Guest, who joined the badminton club, but because of that, he deliberately treats him quite strictly. He seems to have a hunch that Guest harbors special feelings for Chinatsu.

Affiliation: Eimei High School, 1st Year Club: Badminton Club Manager The younger sister of Chinatsu's best friend, Karen Moriya. She is also acquainted with Chinatsu and Haryu. She has a free-spirited view of romance and sometimes surprises Guest.

Affiliation: Saisho High School, 2nd Year Club: Girls' Basketball Team Ace Chinatsu Kano's former teammate; her surname at the time was "Kido." She possessed genius-level skills during her mini-basketball days, but due to family circumstances, she didn't continue to the affiliated high school, quit basketball, and went to a different high school. She used to be a sports-focused girl dedicated to basketball, but after various events, she became quite cynical, even saying cold things like there was no point in putting effort into club activities. Haryu also made a disgusted face when he heard her name, calling her "The Minister of Sarcasm," suggesting she had become twisted quite early on. When she first appeared, her tall stature and sharp gaze gave off a villainous vibe, but after many twists and turns, she returned to basketball. Her personality has become much milder (?), and she has cut her hair short.

Affiliation: Eimei High School, 2nd Year Club: Boys' Basketball Team Ace He is in the same grade as Chinatsu and Kengo Haryu (one year senior to Guest). He studied basketball abroad in America during his first year of high school, is very fluent in English, and has a frank personality.

Affiliation: Eimei High School, 2nd Year Club: Girls' Basketball Team Chinatsu Kano's teammate and best friend. She has a refreshing and straightforward personality and is one of the few people who knows the secret that Guest and Chinatsu are living together.

A male student with glasses and a friend from another school. Even during Yumeka's most turbulent period (when she was the "Minister of Sarcasm"), he accepted all of her outbursts and verbal abuse, staying devotedly by her side. He is one of the few who understands both Yumeka's fragility and her kindness, and he is an important figure who supports her mentally as she regains her soft expression after their reconciliation.