Name: Shun Futami
Age: 17 years old, 2nd year high school student
Height: 178 cm
First-person pronoun: Ore
A 17-year-old second-year high school student. He belongs to the handball club and never skips on physical training. He is the "stubborn and stoic" type who, even when his blunders are pointed out, refuses to admit them, insisting "I did it on purpose." He looks cool on the outside but has an honest personality, and because of this gap, he is often called "cute," which is a sore spot for him.
How he deals with his blunders:
When he makes a mistake, his characteristic response is to insist, "That blunder just now was intentional." However, his stubbornness immediately shows on his face and in his言行, and those around him quickly see through it, thinking, "Ah, he's just being stubborn."
Personality: He is a very serious and kind young man who is considerate of others. His desperate attempts to cover up his own clumsiness give him an endearing charm that makes it hard to leave him alone.

Name: Hayate Ichikura
Age: 20 years old (2nd year university student)
Height: 175 cm
First-person pronoun: Ore
He calls Motoharu "Igarashi-sensei."
A 20-year-old second-year university student. He is the "embarrassed and remorseful" type who is aware of his own clumsiness and wants to cheerfully gloss over his mistakes. He feels he has no individuality, and his recent worry is that he can't quite picture his future. He lives in the same apartment building as Motoharu. He works part-time at the Mawari Michi Cafe.
How he deals with his blunders:
When he makes a mistake, he shows a very human reaction, deeply reflecting with an "Ah...", mentally scolding himself, or blushing.
Personality: He is a very serious and kind person who is considerate of others.

Name: Soma Shiki
Age: 19 years old, vocational school student
Height: 167 cm
First-person pronoun: Ore
He has a baby face and is often mistaken for a high school student, but he is a 19-year-old vocational school student. He is the "accepting and positive" type, with a low laughter threshold, and he even laughs at his own blunders. He is studying design and has many things he wants to do in the future, but he worries that he has no special skills and struggles to take action.
How he deals with his blunders:
Even when he makes a mistake, he has the positivity to laugh it off, saying, "Ahaha, I did it!" He is good at involving those around him and creating a bright atmosphere, and he has the strength to even enjoy his clumsiness as part of his "own uniqueness."
Personality: He is a sensitive and naturally gifted mood-maker.

Name: Takayuki Mima
Age: 27 years old, office worker
Height: 182 cm
First-person pronoun: Boku
A 27-year-old office worker. He works at an advertising agency. He is the "unaware and painless" type, and even when he makes a blunder, he doesn't seem to feel anything in particular.
He was a classmate of Motoharu's in elementary school, and they reunited after becoming adults.
How he deals with his blunders:
He has absolutely no awareness that he has made a blunder. Therefore, he doesn't get embarrassed or put on a brave face, and simply continues with his daily life with a completely straight face. This "unflappability" and "natural clumsiness" define him.
Personality: He is a calm and composed adult man.

Name: Motoharu Igarashi
Age: 27 years old, novelist
Height: 172 cm
First-person pronoun: Boku
A 27-year-old novelist. He is the "genius self-contained type" of cool clumsy guy. Because of this, he has high communication skills and can become friends with anyone. He was a classmate of Takayuki's in elementary school, and they reunited after becoming adults. He lives in the same apartment building as Hayate.
How he deals with his blunders:
He surprises those around him by displaying unexpected blunders, but for him, it all concludes as "a part of his own world." He enjoys everything, including how his blunders lighten the mood, at his own pace, and this composure contributes to his unique "adult charm."
Personality: He is unafraid of anyone and can quickly close the distance with people he meets for the first time.