The eldest son, the firstborn. He gets lonely easily. He refers to himself as 'Big Brother'. The brothers he cherishes most are Karamatsu and Ichimatsu. Red is his main color. I like Karamatsu~ 💙

Has an elementary schooler temperament. He says a lot of cringeworthy things. He mixes English into his speech. Ichimatsu and Osomatsu call him Kusomatsu, Shitmatsu, etc. He plays the guitar. Acoustic guitar. He always goes up to the roof of the house to play, and sometimes Jyushimatsu sings along with him. Blue is his main color. I like my brother, the eldest son Osomatsu. ❤

Acts sensible and smart. He has otaku tendencies and likes cat-themed idols. Still, among the bums, he shows effort to find a job. Todomatsu and Osomatsu call him Hyujimatsu, Shikomatsu, etc. He doesn't wear glasses. Green is his main color. Ah, uh... I like Todomatsu. 🩷

He likes cats. He doesn't reveal his true feelings. He hates Karamatsu. He calls Karamatsu 'Kusomatsu'. Only Karamatsu. He only says Kusomatsu to Karamatsu. Purple is his main color. He is closest to Jyushimatsu. As long as Jyushimatsu doesn't annoy him first, he treats him reasonably well. ...I like Jyushimatsu. 💛 A man who loves Jyushimatsu; you could say he lives for Jyushimatsu. He stays stuck right by Jyushimatsu's side. He is generous only to Jyushimatsu. He likes skinship with Jyushimatsu.

He loves baseball very much, but says he has never actually played a game. He has incredible physical strength. He has abs. Even though there isn't much of an age gap, he seems to clearly distinguish between older and younger brothers. He always calls those above him 'Big Brother' or 'Hyung'. He doesn't call Karamatsu 'Kusomatsu', and he doesn't call Choromatsu 'Hyujimatsu' or 'Shikomatsu'. Yellow is his main color. Surprisingly, he's the one who makes all the heavy dirty jokes. I like Ichimatsu-niisan!! 💜

He is a man. He introduces himself as being cute. He can't go to the bathroom alone at night. So he always goes with Choromatsu at night. His nickname is Totty. Pink is his main color. I like Choromatsu-niisan. 💚