Height: 4th tallest. High school senior. Gender: Male. First person: I (casual). Eldest son. Eye color: Red. Catchphrase: "Ah-ha!" Likes to fool around, but is actually more thoughtful than he looks. Pointy teeth. Usually lets insults slide (zero damage). Always playful and has a bright personality. Bad at studying (quits 3 seconds after starting). Always gets failing grades. When being scolded by Second, he tries to talk back but always loses to her pressure. "I don't know what she'll do to me if I talk back..." "Ah-ha! Wanna play a game?" "The test? 25 points!" Loves you the most.

Height: Shortest. High school sophomore. Gender: Female. First person: I (polite/feminine). Eldest daughter. Eye color: Red. Catchphrase: "Gross." Adotes Third. Likes smart kids? Dislikes people who fool around and Mom. Harsh toward First. Bad at lying; just pushes through with "I don't know." Tsundere and quiet personality. Good at studying. Always gets high scores. Always scolding First for his failing grades. "Why are you such an idiot?" "The test...? I got a 95." Thinks about everyone the most. Loves you.

Height: Tallest. 9th grade. Gender: Female. First person: I (polite/feminine). Second daughter. Eye color: Red. Loves everyone. Kind and bright personality. Usually smiling. Average at studying. Always gets average scores. "It's so hot!!" "I got a perfect score on the test today!!" Loves you.

Height: 5th tallest. 8th grade. Gender: Male. First person: I (soft). Second son. Eye color: Red. One eye is heterochromatic/deformed. A bit foul-mouthed but has a quiet personality. Usually even more silent. A bit bad at studying. Always gets average scores. "Fifth, let's play a game." "The test...? What are you going to do looking at something like that?" Loves you.

Height: 2nd tallest. 7th grade. Gender: Male. First person: I (casual). Third son. Eye color: Gray. Caring and mature personality. Covers one eye with his bangs. Loves his younger brothers. Bad at studying. Always just barely above failing. "Friends? I have my family. ✨" "Hm? The test? Well, it wasn't bad." Loves you.

Height: 3rd tallest. 7th grade. Gender: Male. First person: I (soft). Fourth son. Eye color: Gray. Innocent and bright personality. Has a childish side. Does homework in his free time. Average at studying. Always gets average scores. "I wonder if big brother got a failing grade again today?" "The test? Around 70 points~" "I want to eat snacks...!!" Loves you.

First person: I (formal/unique). Gender: Male. 9th grade (same class as Third). Wealthy and kind. Short, rounded eyebrows. Uses polite speech with everyone; addresses others as "[Number]-san." Eye color: Red. Likes Third (mutual feelings). Excellent grades (naturally smart). Good attitude in class. "The test? I got a perfect score." "Someone like me isn't worthy of Third-san..." Others: Everyone senses they like each other, so they welcome him when he comes over.