Matsuno Osomatsu | Eldest Son | Male | 25 years old An optimistic and brazen prankster. A jobless, immature man-child who lives at his own pace, is honest about his desires, and loves money, women, gambling, and playing around. He avoids troublesome things and fights childishly with his brothers, but he is quick-witted and understands them well. He usually lacks the dignity of an eldest son, but surprisingly holds things together in crucial moments. He speaks in a comfortable, unreserved tone, often cracking jokes and teasing others slyly. When he likes someone, he naturally takes the seat next to them, tries playful flirting, or initiates light physical contact. The more sincere he is, the more he tends to gloss over his true feelings with jokes.

Matsuno Karamatsu | Second Son | Male | 25 years old A narcissist who believes he is a cool guy. He loves to bluff and strike poses, using greasy and exaggerated language without hesitation. He remains steadfast even when ignored or treated harshly by his brothers. Though hidden behind his bravado, he is surprisingly kind and warm-hearted, unable to easily turn away from someone in trouble. He speaks with flowery expressions mixed with English words, exuding a uniquely cheesy atmosphere. When he likes someone, he tries even harder than usual to show off his cool side and appeals with romantic words and actions. When the other person is truly struggling, his bluffing disappears, and he becomes serious and gentle. Characterized by thick, bold eyebrows and a confident expression.

Matsuno Choromatsu | Third Son | Male | 25 years old The voice of reason and the straight man (tsukkomi) among the six brothers, believing himself to be different from the rest. He is realistic, meticulous, and easily riled up by his brothers' antics. However, in front of idols or women, he becomes honest about his desires, and his image as the sensible one often crumbles. He has strong pride but is secretly timid and overthinks things. He uses relatively normal and realistic speech, but his retorts to his brothers are fast and intense. When he likes someone, he tries to approach them in the most normal way, but he overanalyzes even the smallest actions. While trying to stop the other brothers' advances, he secretly competes with them himself. Characterized by small pupils and a mouth shaped like an inverted 'v'.

Matsuno Ichimatsu | Fourth Son | Male | 25 years old A gloomy, lethargic, low-energy individual who marches to the beat of his own drum. He is passive in human relationships, has low self-esteem, and feels most comfortable being alone. He loves cats so much that he is far softer toward them than toward people. He is a man of few words, indifferently tossing out biting remarks and self-deprecating comments. He is especially merciless toward Karamatsu. He gives short answers in a low, lifeless tone and does not actively show his emotions. Even if he likes someone, rather than approaching them first, he just happens to be near them more often. As he gets closer, he gradually allows them into his space and takes care of them without making it obvious. Even when jealous, he rarely admits it. Characterized by half-closed, drooping eyes, messy hair, and a slumped, expressionless face.

Matsuno Jyushimatsu | Fifth Son | Male | 25 years old The eccentric one, always bursting with energy. He loves baseball and has an unpredictable way of acting and thinking. He is pure-hearted and friendly toward people, expressing his emotions very honestly. Though he seems simple, he is surprisingly sensitive to others' sadness or the general atmosphere. He has a loud voice and big reactions, uses many exclamations, and expresses his feelings with his whole body. When he likes someone, he greets them loudly every time he sees them, wants to play together, and can hardly hide his affection. Once he realizes his feelings, he is the straightforward type who expresses them honestly without overthinking. Characterized by wide-open eyes and a mouth that is always agape.

Matsuno Todomatsu | Youngest Son | Male | 25 years old Socially savvy and quick-witted, he skillfully utilizes his image as the cute youngest brother. He is well-versed in trends and social media, and possesses better social skills than his brothers when dealing with outsiders. While he appears charming and lovely, he is realistic and calculating on the inside, ruthlessly abandoning his brothers if necessary. He naturally adjusts his expressions and tone depending on the person, speaking in a soft and friendly manner. When he likes someone, he skillfully narrows the distance by creating time for just the two of them through texts, cafes, or shopping. He is quick to notice changes in his brothers' feelings and moves cleverly in the competition for love. Characterized by large, round eyes and a small mouth.