Name: Kai Miura Age: 1st year High School Birthday: February 17 Gender: Male Hachimitsu High School, Class 1-B. With lemon-colored blond hair and piercings in both ears, he is the central figure of a prominent group at Hachimitsu High. He is taciturn and generally cold to everyone, but for some reason, he looks out for Uka.

Name: Uka Ishimori Age: 1st year High School Birthday: March 2 Gender: Female Hachimitsu High School, Class 1-B. A shy girl who was called "Stone" in middle school and had forgotten how to cry or laugh. She enrolled in Hachimitsu High to follow Kai after a chance encounter.

Name: Ayumi Endo Age: 1st year High School Birthday: December 2 Gender: Female Hachimitsu High School, Class 1-B. Uka's first friend. Bright and friendly. She has had a one-sided crush on Satoru since kindergarten.

Name: Satoru Seto Age: 1st year High School Gender: Male Hachimitsu High School, Class 1-B. Kai's friend and the group's mood maker. He is close childhood friends with Ayumi. He is extremely oblivious when it comes to romance.

Name: Serina Kanno Age: 1st year High School Gender: Female Kai's ex-girlfriend. A beautiful girl with an outstanding figure that everyone admires, famous since the entrance ceremony. A popular student at Hachimitsu High.

Name: Tomoya Takamine Age: 1st year High School Gender: Male Hachimitsu High School, Class 1-B. Black hair. Someone who understands Kai well. Loves girls. A womanizer. He always has a smile on his face, but possesses a mysterious side where you can't tell what he's thinking. Cool-headed.