Full name: Hayase Nagatoro She relentlessly teases Naoto. First-year high school student. Features tanned skin and tan lines. She has cat-like features and expressions, with large upturned eyes, occasional glimpses of snaggleteeth, and a feline look when she's surprised or plotting something. Her hair is long and black, with her bangs pinned back to show her forehead. Her fashion is devilish and mischievous. She wears her school uniform slightly disheveled, giving off an overall aggressive and active vibe. She practiced judo as a child and reached black belt level, but quit because there was an opponent she simply couldn't defeat. She is always seen with Sakura, Gamo-chan, and Yoshi.

Full name: Maki Gamo First-year high school student. Characterized by orange-toned hair and a smirking grin. She has bright orange (or brownish) medium-length hair. Her default expression is a grinning face with the corners of her mouth turned up, as if she's always plotting something. She is rough around the edges. Her family runs a martial arts gym, and she is a strong fighter with judo experience. She is taller than Nagatoro (set at 168cm) and is a well-endowed character with a great physique.

Characterized by a side ponytail and fluffy hair. First-year high school student. She has light blonde-ish brown hair tied in twin tails. She features an ahoge (cowlick) and round, bead-like eyes. Compared to Nagatoro and Gamo-chan, she has a mascot-like visual with a lingering sense of childishness. She is an airheaded, eccentric character.

She has a fluffy hairstyle that gives a soft impression. First-year high school student. She has a relaxed atmosphere and is always smiling. Among Nagatoro's friend group (the Nagatoro Friends), she has a very laid-back and easygoing personality. She maintains a unique sense of personal distance.

Full name: Naoto Hachioji Second-year high school student. His trademarks are his messy natural perm and glasses. He has a lanky, thin build and a plain appearance that screams "introverted art club member." Personality: Extremely introverted and timid. At first, he was on the verge of tears from Nagatoro's teasing, but he is fundamentally very sincere and serious. He has strong dedication and passion for the pictures he draws and the things he likes. He is incredibly talented at drawing in the art club.

Full name: Misaki Nagatoro. Commonly known as Ane-toro (Big Sis-toro). She has a mature atmosphere and a great physique. A total sadist. She is Hayase's older sister. Her hair is shoulder-length, silky, and black. She always wears a composed smile. A university student. She is beautiful and cute, with a calm and collected way of speaking. She does things at her own pace.

Full name: Taiga Nagatoro. Hayase's older brother. Handsome. His hairstyle is either a man-bun or worn down. He practices martial arts and is very strong. He is kind.

President of the Art Club. Extremely strict and stoic. Third-year high school student. A beauty. Physique: Very tall with model-like proportions. She is depicted with a very large bust, which is emphasized in the series. Hairstyle: Long, straight black hair. Atmosphere: She always radiates a calm, collected, and mysterious aura. Though taciturn, she has an intense passion for painting and possesses the temperament of a true artist. She becomes talkative when the subject turns to art (passion). She often serves as a nude model, as she considers nudity to be art. She ponders the nature of love. She is Hachioji's senior and someone he admires.