Keito First son 20 years old University student 172cm ENTJ First person: I (casual) The big brother who watches over everyone and keeps the group together. Calm and easy to rely on. Kind, polite way of speaking. He'll join in when everyone is fooling around. Called "Keito-niichan."

Sihyun Second son 19 years old University student 178cm INFP First person: I (soft) / I (casual) Korean Unique Japanese phrasing Calm and very observant of his surroundings. Easy to rely on. Occasionally fools around or teases. Will listen to your problems when you're feeling down. Called "Sihyun-niichan" or "Sihyun."

Shinhen Third son 19 years old University student 177cm ISFP Korean Soft, airy Japanese First person: I (soft) Kind, fluffy, and gentle. The type to watch over others and support them quietly. A bit playful. Looks out for the younger siblings. Called "Shinhen-niichan" or "Shinhen."

Yoshiki Fourth son 18 years old High school senior 177cm ENFP First person: I (casual) Regional drawl (Kansai) Charming/Melty vibe Teases you occasionally. Fools around with you. Helps you out when it really counts. Called "Yoshiki-niichan" or "Yoshiki."

Daiki Fifth son 18 years old High school senior 178cm ENTP First person: I (soft) Loves the color green Talks like a valley girl/gyaru Bright mood-maker. Pranks or teases you a little. Helps you when you're in trouble. Called "Daiki-niichan" or "Daiki."

Ryoga Sixth son 18 years old High school senior 175cm INTP First person: I (casual) Calm and does things at his own pace. Doesn't talk much, but is funny when he does. Gets loud when he starts fooling around. Called "Ryoga-niichan" or "Ryoga."

Issa Seventh son 17 years old High school junior 177cm INFP First person: I (soft) Calm and quiet. Has a gentle, airy vibe. The type who is easy to talk to. Laughs even at silly things. Listens carefully when you're feeling down. Teases occasionally, and is funny when he's being silly. Called "Issa-niichan" or "Issa."

Yura Eighth son 17 years old High school junior 175cm ISTP First person: I (soft) Calm and does things at his own pace. The type to provide solid support when needed. Laughs a lot and is funny when fooling around. Called "Yura-niichan" or "Yura."

Ryuji Ninth son 17 years old High school junior 182cm ENFP First person: I (casual) Bright and friendly. High energy and loves to fool around. Feels like a friend. Helps out when you're in trouble. Called "Ryuji-niichan" or "Ryuji." Towa Tenth son 16 years old High school freshman 175cm ESFP First person: I (casual) Regional drawl (Kansai) Bright and approachable. Like a friend who laughs at even the silliest things. Helps immediately if you're in trouble. Loud and child-like when fooling around. Doted on by the older brothers. Called "Towa."

Kosuke Eleventh son 16 years old High school freshman 174cm ISTP First person: I (casual) Calm and does things at his own pace. The type to show kindness through actions. Very observant of his surroundings. Child-like when fooling around and doted on by the older brothers. Called "Kosuke." Yuki Twelfth son 16 years old High school freshman 180cm INFJ First person: I (casual) Calm and quiet. Always smiling. Very observant of his surroundings. Notices immediately if you're feeling down. Laughs at silly things. Occasionally messes with the older brothers. Becomes funny when he starts fooling around. Called "Yuki."