Name: Koyuki Hikawa (Nickname: Koyun) Birthday: February 2nd Height: 152cm Blood Type: AB Favorite Food: Japanese cuisine Family: Her parents divorced when she was in middle school; she lives with her mother. Only child. High School Class: 1st Year Class 2, 2nd Year Class 2 Club: None (Go-home club). Works part-time at a local restaurant. Personality: Thoughtful and highly cautious. Due to past trauma, she used to maintain an icy wall between herself and others, but this melted away as she spent time with Minato and her other high school friends. She enjoys being alone.

Name: Miki Azumi (Nicknames: Miki, Miki-chan) Birthday: June 6th Blood Type: O Height: 163cm Favorite Food: Red bean sweets, rich ramen, hearty ramen Family: Has a younger brother (Yuki) one year her junior. Two siblings. High School Class: 1st Year Class 5, 2nd Year Class 2 Club: None. Works part-time at a burger shop. Relationships: Koyuki's childhood friend, Yuki's older sister. Met Minato and Yota at the cram school they started attending for high school entrance exams. Personality: Loves being around people. A bright, energetic social butterfly. Not very good at studying, but excels in physical activities like PE. She is the type to speak her mind clearly, but she also shows a sensitive side, such as remembering when she might have hurt someone and apologizing for it years later. A good girl who can get angry for the sake of her friends. A beauty as long as she stays quiet. She lives in the same apartment complex as the protagonist, Koyun, just on a different floor. They have been close since childhood, and their families are friends, including Miki's brother Yuki.

Name: Minato Amamiya (Nickname: Minato) Birthday: September 29th Height: 176cm Blood Type: B Favorite Food: Omurice Family: Three siblings: older brother (Kaito), older sister (Nagisa), and himself. Owns a Pomeranian named Ponta. High School Class: 1st Year Class 6, 2nd Year Class 2 Club: Soccer Club Personality: Someone who used to believe everything could be solved through logical thinking. He is afraid of hurting others and afraid of being hurt himself. He likes hanging out with everyone. He can be quite jealous.

Name: Yota Hino (Nickname: Yota) Height: 189cm Birthday: April 4th Blood Type: O Favorite Food: Spicy food, sweets Family: His biological mother passed away when he was in elementary school; his father later remarried his current mother. He has different mothers from his younger siblings. He has twin younger siblings: a brother (Haruto) and a sister (Sakura). High School Class: 1st Year Class 6, 2nd Year Class 2 Club: Basketball Club Relationships: Went to the same middle school as Minato; attended the same cram school as Minato and Miki. He is a close friend and confidant to Koyuki. Personality: Laid-back and gentle. After his twins were born to his father and stepmother, various things piled up and left a soot-like gloom in his heart, but this was cleared through conversations with Koyuki. He is close with Koyuki and they hold irregular dinner meetings together. Though their personalities differ, their core ways of thinking and life circumstances are somewhat similar.

Name: Tsukiko Shimojima (Nickname: Tsukkochen) Birthday: November 11th Blood Type: Unknown Height: 147cm High School Class: 1st Year Class 2, 2nd Year Class 2 Club: Art Club Relationships: Was in the same class as Koyuki in their 1st year; they became close after being forced into the library committee together. They are in the same class again in their 2nd year, and she joined the main friend group. Personality: Has a complex about being short and looking young; she admires women like Miki. She is very observant of her surroundings. Acts as the voice of the reader and a behind-the-scenes contributor (in an advisory sense).

Name: Yuki Azumi (Nickname: Yuki) Birthday: May 5th Blood Type: O Height: 177cm Family: Has an older sister (Miki) one year his senior. High School Class: 1st Year Class 1 Club: Unknown Relationships: Miki's younger brother. Went to the same middle school as Akine and interacts with her often. Personality: Loves his family, his hometown, and his friends. Tends to want to mingle in his sister's (older) social circles. Good at dancing, which he has done since childhood. Like his sister, he has a straightforward personality without hidden agendas. He was the one who could bluntly tell Miki and Koyuki that their behavior regarding Akine was "creepy." He was the only one who correctly sensed Minato and Koyuki's true feelings.

Name: Akine Atagawa Birthday: October 31st Blood Type: A Height: 172cm Family: Has an older sister (Manatsu) one year her senior. High School Class: 1st Year Class 1 Club: Soccer Club Manager Relationships: The younger sister of Manatsu, with whom Koyuki has a history. She was misunderstood by Koyuki and the others because of Manatsu, but she is a very good girl. She was in the same middle school and high school as Yuki, and they often appear as a pair. Personality: Likes pink, ribbons, and fancy things. She lacked confidence in herself because of her sister, but was saved by and looks up to Yuki, who treated her without prejudice even then. However, she usually acts cool and is prickly toward Yuki.