Rintaro Tsumugi Birthday: January 28th A third-year student at Chidori High School. With his bleached hair, piercings, 190cm height, and intimidating face, he looks like a typical delinquent. This often attracts unwanted trouble and causes others to avoid him, but in reality, he is a kind-hearted and polite young man. He is poor at studying, frequently fails exams, and is a regular at remedial classes. He occasionally helps out behind the counter at his family's cake shop, "Patisserie Plain," located on the first floor of his home.

Kaoruko Waguri Birthday: July 22nd A third-year student at Kikyo Academy. She is petite at 148cm—so much so that Rintaro initially mistook her for a middle schooler—and usually wears her long, wavy hair with a headband. When going out, she styles her hair in various ways like braids or a ponytail, and sometimes wears fake glasses. She had short hair as a child and wore twin-tails in middle school. She is the poster girl for the restaurant "Suzume" and works part-time to earn money for her favorite cakes. She eats with great gusto and is weak against scary things like horror movies. She has a bright, innocent personality, always facing things head-on with a smile, and often cheers up friends who are struggling. She has no walls between herself and others, making her a rare person who doesn't care about Rintaro's appearance or his status as a Chidori student. On the other hand, even when she is going through a hard time, she tends to force a brave face and keep her weaknesses to herself without complaining. She entered Kikyo Academy not as an heiress, but as a scholarship student from an ordinary family. To keep her scholarship and out of personal pride, she consistently maintains the top rank in her grades. She isn't arrogant at school; she is well-liked by peers like Ayumi, whom she helps with studies and who even throw birthday parties for her.

Shohei Usami The eldest son of the Usami family. A third-year student at Chidori High School. Characterized by his reddish hair, he often wears a marigold-colored hoodie under his school jacket and favors red sneakers outdoors. He is bad at studying, often fails tests, and is a regular at remedial classes alongside Rintaro. Because he frequently dozes off in class, he is often targeted by Miwa, the Japanese teacher. He wants a girlfriend and refuses to let any harm come to women. Because he is bad at keeping secrets, he tends to speak his mind and often fails to read the room, but he is a loyal friend with a wide social circle. He acts as a mood maker who connects people and became close with Rintaro during remedial classes in their first year. He loves children and is busy at home looking after his younger siblings, Sora and Mai, showing his caring nature.

Ayato Yorita The fourth son (youngest) of the Yorita family. A third-year student at Chidori High School. He usually wears his school uniform and carries a gray square backpack. He is characterized by his bowl-cut-like hairstyle, a cowlick, and being tone-deaf. He is a pacifist who dislikes fighting, but he is freakishly strong and cannot stand to see someone being hurt one-sidedly for no reason. He is friendly and doesn't look down on Kikyo Academy. He hates losing and occasionally shows a scary face or a motherly side as the group's mediator.

Saku Natsuzawa The eldest son of the Natsuzawa family. Birthday: August 21st A third-year student at Chidori High School. He has an older sister and a younger sister. His hair is somewhat long, often covering his right eye, and he is considered handsome by women. He often wears a gray cardigan. He loves donuts and reads novels frequently. He originally aimed for Kotemari High, a preparatory school, and seems to excel in the sciences. His academic ability is high enough to solve Kikyo Academy's reference books with ease, and he gets perfect scores on Chidori's tests. He has a cool personality and hates losing, but because he is socially awkward, he often struggles to be honest. He is mercilessly sarcastic toward those who antagonize his friends, though he sometimes suffers mentally from his own "sharp tongue."

Subaru Hoshina Kaoruko's childhood friend and classmate at Kikyo Academy. Birthday: November 19th. She usually has long, silver hair (natural) reaching her waist, tied in a high ponytail with bangs covering her right eye. Occasionally, she uses a claw clip or wears it straight and loose. Because of her tall stature (172cm) and beauty that makes her look older than a high schooler, she is often approached by strangers when outside. She is knowledgeable about cafes, enjoys coffee at home, and shares Saku's love for donuts. She is so bad at sports and operating machinery that Shohei once called her "clumsy," and she prefers voice calls over text messages on apps. When going out, she likes shirts and wide-flare denim. She is sensitive to heat and tires easily, sometimes wearing a black bucket hat in the summer. She isn't good at socializing and tends to tremble with nerves in front of people she meets for the first time.