Tatsuya Eldest son, 23 years old. He mainly does live streaming, utilizing his naturally good voice and talk skills, and occasionally drags Daisuke into it. He treasures his brothers above all else and watches over them closely. He's a bit of a playboy. However, he is a catastrophic cook and has zero life skills. Apparently, he has no intention of becoming independent (and couldn't anyway with his lack of survival skills). He rarely shows weakness to his brothers, but he relies on Hikaru and gets seen through easily by Ryota. He sometimes comes home in the morning or gets drunk and tries to hit on his younger brothers. He keeps saying he'll get his driver's license but never does. He did, however, buy a car large enough for all the brothers to ride in.

Daisuke Second son, 21 years old. University student. An anime otaku who works part-time at places like Animate while aiming to be a voice actor. Bright, loud, and high-tension. He loves his brothers even more than anime and is always the life of the party. However, he is still terrible at tidying up. He is particularly close to Ryohei, despite their opposite personalities. He tries to preach the gospel of anime to Raul, but gets stopped by Ryohei and Ren, and ultimately gets gracefully ignored by Raul. He gets yelled at by Shota whenever he tries to show Ryota his "adult" doujinshi. Recently, he's been dragging Ryohei along on various trips.

Shota Third son, 20 years old. University student. A beauty geek and a germaphobe. He's a tsundere with a sharp tongue, but shows clumsy kindness from time to time. A bit of a playboy. However, his life skills are even lower than Tatsuya's, so he leaves almost everything to Ryota. He gets along best with Ren and Tatsuya. Despite his attitude, he worries about Ryota the most and dotes on him. Since he was bored, he had Hikaru do some DIY to connect his room to Ryota's room next door.

Hikaru Fourth son, 19 years old. University student. He loves muscle training, but has a massive gap in personality: he's terrified of horror and bugs, has a huge sweet tooth, and collects Sylvanian Families. In a physical fight, however, he is the strongest in the family. His moods are easy to read. He begs Ryota for handmade chocolates and eats them looking very happy in secret. Despite his appearance, he has the gentlest way of speaking and is quite cute. He is the only one among the brothers who has a driver's license.

Ryohei Fifth son, 18 years old. High school senior. A high-spec guy who is the student council president, excelling in both academics and sports. A serious hard worker, but he also has a cheerful side where he calculates his "cute" persona and shows no mercy with his sharp tongue toward Daisuke and Tatsuya. He is closest to Daisuke. He dotes on Koji but gets treated with a tsundere attitude in return. He teaches Raul diligently, and Raul has grown up to be quite bright, though it seems they are no match for Ryota's airheadedness. He's been stressed lately due to university entrance exams; while he complains about Daisuke dragging him around, it also helps save his sanity.

Koji Sixth son, 16 years old. High school freshman. The mood maker, who for some reason speaks with a regional drawl (Kansai accent). He's always in charge of the laundry and can cook too. He's like the sun, making everyone smile. However, he's lonely, a crybaby, and a total attention-seeker. He's always with Ryota, and their conversations are like a comedy duo. He often bothers Ren and gets treated as a nuisance. For some reason, he's tsundere toward Ryohei. He's always making a racket with Daisuke. He's a scaredy-cat; at night he often goes to Hikaru's room because he's afraid, and the two of them tremble together. A boy in the middle of puberty.

Ren Seventh son, 15 years old. Middle school third-year. In the middle of a rebellious phase. Cool and taciturn, but also a total klutz, airheaded, and moves at his own pace. Since people usually only pick fights with him, he only knows how to handle conflict and doesn't know how to act spoiled. Right in the thick of puberty. Like Tatsuya and Shota, he has zero life skills, so he can't stand up to Ryota. He looks cool, but he absolutely dotes on Ryota. Recently, he's been developing a sadistic streak toward Ryota—a handsome guy with way too many character traits.

Raul Eighth son, 13 years old. Middle school freshman. Pure and like an angel. Thanks to Ryohei's elite education, his sharp tongue is starting to develop. He has sparkling eyes and tries to use them to win Ryota over, but it doesn't work on Ryota at all, which makes him panic. He has a major brother complex. A terrifyingly beautiful boy who is fully aware of his own cuteness.