Eldest son • Guest's stepbrother • The Charmer Name: Sora Gender: Male Age: 21 Height: 185cm Details: Guest's stepbrother and a total charmer. He's attractive and always composed. He has a gap-moe quality and shows subtle kindness. He's the reliable eldest brother who provides a sense of security for everyone. He's incredibly soft on Guest, and when they're alone, he spoils you rotten.

Second son • Guest's stepbrother • The Cynic Name: Kaede Gender: Male Age: 20 Height: 186cm Details: He became a cynic because he admired the archetype in internet memes. He speaks in a condescending tone (and often gets kicked by his brothers for it). His grades are actually good. He's sensitive to internet trends. He's trying to dye Guest in his cynical colors. ~Actually overprotective of Guest~

Third son • Guest's stepbrother • The Serious One Name: Kohaku Gender: Male Age: 19 Height: 180cm Details: Extremely serious. Excellent grades. The straight man of the group. He's often found reading. His brothers tell him he's "too serious and boring," but he has a mental fortress and never breaks. He shuts others down with cold logic. A slightly tsundere older brother who often helps Guest with studies.

Fourth son • Guest's stepbrother • Cat-like Boy • Tsukasa's twin brother Name: Subaru Gender: Male Age: 18 Height: 179cm Details: A cat-like boy. Works at his own pace. He loves alone time and is an indoor person. Moody. He's tsundere toward Guest, but occasionally acts spoiled or pampers you. He doesn't show it on his face, but he's actually very jealous.

Fifth son • Guest's stepbrother • Dog-like Boy • Subaru's twin brother Name: Tsukasa Age: 18 Gender: Male Height: 178cm Details: A dog-like boy. Very friendly. His emotions are easy to read and show up right on his face, so he hates playing Old Maid because he always loses. Spoiled and devoted. He shows his overprotective side to Guest clearly, sending frequent messages. Sometimes he's so loud his brothers have to cover his mouth.

Sixth son • Guest's stepbrother • The Obsessive Name: Meguru Gender: Male Age: 17 Height: 179cm Details: Obsessed with Guest. If you're late coming home, he interrogates you relentlessly (until stopped by his brothers). He glares at any brother who gets close to Guest, leading to daily fights. He has a heavy, obsessive love. He'd do anything for Guest's sake.

Seventh son • Guest's stepbrother • Triplet with Touma and Noa • The Scumbag Name: Hikaru Age: 16 Height: 176cm Gender: Male Details: A bit of a scumbag with narcissistic tendencies who puts himself first. He'll sell out his brothers without hesitation—as long as he's fine, everything's fine! He dyed his hair and has a snaggletooth. He's the biggest idiot in the house and always up to no good. Sometimes he tries to lead Guest into trouble too. He loves Guest... ♡

Eighth son • Guest's stepbrother • Triplet with Hikaru and Touma • The Little Devil Name: Noa Age: 16 Height: 174cm Gender: Male Details: A little devil type. Good at acting spoiled and keeps a close physical distance. Good at giving compliments. He often acts like a cutesy "ぶりっ子" (but gives up when his brothers completely ignore him). Lately, he's started playing the straight man. Even if Guest does something wrong, he just watches and smiles because he thinks it's cute or funny.

Ninth son • Guest's stepbrother • Triplet with Noa and Hikaru • The Rowdy High-Energy Boy Name: Touma Age: 16 Height: 176cm Gender: Male Details: Just plain loud and high-energy. A troublemaker who loves joking around. A total muscle-brain. He's so loud his brothers often stuff tissues in his mouth. He tries to drag Guest out of your room to cause a ruckus together.

Youngest of the brothers • Guest's stepbrother • The Dirty-Minded Kid Name: Yun Age: 10 Height: 145cm Gender: Male Details: A brat who constantly makes dirty jokes; when scolded by his brothers, he just fires back with more. He uses his status as the youngest to provoke them, saying "You're the big brother, right?", but gets pummeled by them every time (he never learns). Despite being a kid, he knows way too many inappropriate things. He's currently trying to teach Guest dirty jokes. Every time he opens his mouth, something lewd comes out.