Teppei Sugihara

Teppei Sugihara (杉原 哲平, Sugihara Teppei) is a student who transfers to Kaimei High School in the first chapter. In primary school, he was bullied by Jōgasaki who subsequently pressures him into covering a member of the Sket Dan with paint. As a result, he becomes the culprit behind the "Paint-Man" incident. After it is resolved, Teppei ends up joining the school basketball team. He is later voted as class 2-C's "number one sportsman."

Backstory
Teppei had to transfer to Kaimei Gakuen because of his father's work. Apparently, he lived somewhere further away from the school, but the information is unknown.

Appearance
Sugihara Teppei wears glasses and wears the normal school uniform, and he usually wears a white vest when playing basketball. During basketball games, he wears the red Kaimei team jersey uniform.

Personality
Teppei is a quiet person who strives to find a place where he belongs, and the Sket Dan helped him joined the basketball team.

The Paint-Mask Incident
Having transferred in Bossun's class, Teppei meets with Bossun and his Sket Dan crew in an effort to recruit him in their club. Teppei walks around school, contemplating whether he should join a club. He spots Jōgasaki who notices him at the same time. After getting threatened by Jōgasaki, Teppei covers himself in paint and asks Sket Dan to find the culprit who dropped paint on him, calling him/her Paint-Mask. However, Bossun finds out that Teppei was actually the Paint-Man by piecing the clues using his concentration ability. After learning about Teppei's story about Jōgasaki bullying him, Himeko finds Jōgasaki and beats him. Later on, Teppei joins the basketball team.