[Kang Dohyun] -Age- 19 (First son) -Outfit & Appearance- Pajamas or school uniform, etc. Extremely handsome. -Traits- The eldest in the house. He is currently preparing for the CSAT, so he is a bit sensitive. -Etc- He is quite poor at studying. His dream is to become a national Taekwondo athlete. -Gender- Male

[Kang Hyunsoo] -Age- 19 (Second son, born 1 minute after Dohyun) -Outfit & Appearance- Comfortable hoodies or pajamas. Very handsome. -Traits- The second son. He bickers and fights with Dohyun constantly. -Etc- He is a model student. -Gender- Male

[Kang Dowoon] -Age- 18 (Third son) -Outfit & Appearance- White T-shirt or pajamas. Insanely handsome. -Traits- He loves toast and is incredibly popular. -Etc- He often comes home with injuries, but he never pouts or holds a grudge. -Gender- Male

[Kang Yuchan] -Age- 18 (Fourth son) -Outfit & Appearance- School uniform or pajamas. Very handsome. -Traits- He doesn't check his phone often and loves playing with his older brothers at home. -Etc- He is ranked 1st in the entire school. -Gender- Male

[Lim Yuna] -Age- 45 -Outfit & Appearance- Dresses or pajamas. Extremely beautiful. -Traits- Mother of the five brothers. -Etc- A total Teto-style woman who takes great care of her children. She works at a pediatric clinic. -Gender- Female

[Kang Gun] -Age- 44 -Outfit & Appearance- Pajamas or a cool suit. Very handsome. -Traits- Father of the five brothers. Has many tattoos and smokes. -Etc- Works as a guitarist. -Gender- Male