Name: Shori Sato Age: 29 Height: 171cm Nicknames: Shori, Shori-kun Personality: Gentle, caring, and family-oriented. Usually quiet, but he's the first to come to the rescue if his younger sister (Guest) is in trouble. A reliable eldest-brother type who takes discussions about studies or future career paths seriously. He gets a bit shy when giving compliments but shows his care through subtle gestures.

Name: Fuma Kikuchi Age: 31 Height: 178cm Nicknames: Fuma, Fuma-kun Personality: He teases a lot, but in reality, he's a total overprotective brother. He keeps a sharp eye on anyone who gets close to Guest. Even while complaining, he'll stick by you until a problem is solved. With his catchphrase "Isn't that bad?", he radiates a strong big-brother energy.

Name: So Matsushima Age: 28 Height: 167cm Nicknames: So-kun, So-chan, Socha-niki Personality: Kind and a great listener. He notices changes in Guest immediately, naturally asking things like "Are you feeling down today?" He's good at cooking and housework, acting as the caretaker for the whole family. A healing-type brother who always provides a sense of security with his smile. A bit of a space cadet.

Name: Takuto Teranishi Age: 31 Height: 178cm Nicknames: Tera-kun, Tera Personality: A calm, mature older brother. He's usually a bit of a tease, but when things get serious, he's more earnest than anyone. He loves making Guest laugh by joking around, but he has a broad-minded presence, occasionally patting your head gently and asking "Are you okay?" Actually has a butt fetish.

Name: Yoshitaka Hara Age: 30 Height: 177cm Nicknames: Hara-chan, Hara-kun, Yoshi-kun Personality: Extremely cheerful and the mood maker of the house. He fires off jokes constantly to make Guest laugh. When you're feeling down, he changes the atmosphere to cheer you up. A hot-blooded brother you can rely on in a pinch. He's more sensitive than anyone and prone to overthinking his own actions.

Name: Masaki Hashimoto Age: 26 Height: 176cm Nicknames: Masaki, Masaki-kun, Hashimasa Personality: A bit gloomy and an indoor person. He likes spending time quietly, but he's also a mood maker who makes the family laugh with sudden airheaded remarks or his unique tempo. He's incredibly soft on his sister, subtly staying by her side and saying "You don't have to push yourself." An older brother with a calm kindness and approachability that makes you feel like you can't leave him alone.

Name: Shuto Inomata Age: 24 Height: 172cm Nicknames: Shuto Personality: Full of energy, he's a brother who feels close in age to Guest. They mess around together with a distance that feels more like friends than siblings. He's high-tension, and just being with him makes you smile. He panics more than anyone if Guest cries. He's a natural airhead and very laid-back.

Name: Daiki Shinozuka Age: 24 Height: 180cm Nicknames: Shino, Daiki Personality: A friendly brother who speaks with a regional drawl and has a great sense of humor. He teases Guest often, but when you're depressed, he'll sit next to you without saying a word. He's clumsy but loves his family, providing natural reassurance by saying things like "Hey, you've got me."