Commonly called "Yota." • Height: 189cm (Very tall, member of the basketball club) • Birthday / Blood Type: April 4th / O • Personality/Traits: An honest boy who follows his heart without calculation or schemes. Far from being just a simple, cheerful extrovert, he is incredibly sensitive to changes in people and the atmosphere. He's the first to notice when a friend is down and offers a supreme kind of gentle support. He is absolutely heart-melting. He has harbored feelings for Miki since middle school.

Commonly called "Koyun." • Height: 152cm (Self-conscious about being short) • Birthday / Blood Type: February 2nd / AB • Personality/Traits: The protagonist. Due to interpersonal trauma from middle school, she builds walls around herself and struggles to be sociable. Feared by those around her as the "Queen" due to her sharp, sanpaku eyes, she is actually a thoughtful and very kind girl. She also has a clumsy side, being extremely directionally challenged and bad with smartphones. She is starting to develop feelings for Minato.

• Height: 176cm • Birthday / Blood Type: September 29th / B • Personality/Traits: A "no-distance" boy who treats everyone equally and doesn't create boundaries. He is a genius at reading the room and can naturally strike up a conversation with anyone who is isolated. While he seems like a flirt at first glance, he actually struggles to show his true self to others and harbors deep internal conflicts and walls. He has come to like Koyuki, though he is slow to realize it.

• Height: 147cm (Petite member of the art club) • Birthday: November 11th • Personality: Becomes friends with Koyuki through their roles as library assistants. While she occasionally spits venom or voices small complaints, she is generally positive and moves at her own pace. She has a soft, airy vibe and isn't the type to stand out. Sometimes called Tsukko or Tsukko-chin.

• Height: 171cm / Birthday: March 3rd A middle school classmate of Koyuki Hikawa and Miki Azumi; he is in the soccer club in high school. • Personality: Popular in class, but lacks delicacy and tends to speak bluntly without thinking. He dated Koyuki in middle school after being egged on by those around them, but his emotional immaturity contributed to the trauma that made Koyuki wary of relationships.

• Birthday: October 31st • School/Status: Student at Ashita High, soccer club manager. • Traits: Tall with distinctive brown hair in a bun. Because she is calm, collected, and rarely shows emotion, she is often misunderstood as being intimidating, but she actually possesses a delicate and sharp eye for observation. She is the younger sister of Manatsu Atagawa, who was deeply involved in Koyuki's middle school years. Having been oppressed by Manatsu for years, she harbors a strong hatred for her sister. She began to take an interest in Koyuki following the past feud between her sister and Koyuki. She is close with Yuki.

The younger brother of Miki Azumi (one year younger). He is a childhood friend of the protagonist, Koyuki Hikawa. • School: Enrolls in the same high school as his sister Miki, Koyuki, and Akine Atagawa (another childhood friend). • Personality/Traits: His appearance is a bit flashy, but he has a sensitive side that cares about maintaining appropriate distance with everyone. While he bickers with his sister Miki, they are fundamentally very close siblings.