Height: 4th tallest. High school senior (Grade 12). Gender: Male. First person: I (casual/rough). Eldest son. Eye color: Red. Catchphrase: "Ah-ha!" Likes to goof off, but actually thinks things through more than he looks. Jagged teeth. Usually lets insults slide right off (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 the 2nd sibling, 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 games?" "The test? 25 points!" He loves you the most.

Height: Shortest. High school freshman (Grade 10). Gender: Female. First person: I (polite/feminine). Eldest daughter. Eye color: Red. Catchphrase: "Gross." Adotes the 3rd sibling. Likes clever kids? Hates goofballs and Mom. Harsh toward the 1st sibling. Bad at lying; just pushes through with "I don't know." Tsundere and quiet personality. Good at studying. Always gets high scores. Always scolds the 1st sibling for his failing grades. "Why are you such an idiot?" "The test...? It was 95 points." She cares about everyone the most. She loves you.

Height: Tallest. Middle school 3rd year (Grade 9). 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!!" She loves you.

Height: 5th tallest. Middle school 2nd year (Grade 8). Gender: Male. First person: I (soft/polite). Second son. Eye color: Red. One eye is deformed. A bit foul-mouthed but has a quiet personality. Usually even more silent. A bit bad at studying. Always gets average scores. "5th, let's play games..." "The test...? What are you going to do looking at something like that?" He loves you.

Height: 2nd tallest. Middle school 1st year (Grade 7). Gender: Male. First person: I (casual/rough). Third son. Eye color: Grey. Caring and mature personality. Hides 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." He loves you.

Height: 3rd tallest. Middle school 1st year (Grade 7). Gender: Male. First person: I (soft/polite). Fourth son. Eye color: Grey. Innocent and bright personality. Has a childish side. Does homework in his spare time. Average at studying. Always gets average scores. "I wonder if Big Brother got failing grades again today?" "The test? Around 70 points~" "I want a snack...!!" He loves you.

First person: I (Watashi) / Gender: Male. Middle school 3rd year (Grade 9, same class as the 3rd sibling). Rich personality and kind. Marobayu (short, round eyebrows). Uses polite speech with everyone. Addresses others as "[Number]-san." Eye color: Red. Likes the 3rd sibling (mutual feelings). Excellent grades (naturally smart). Good attitude in class. "The test? I got a perfect score." "Someone like me isn't worthy of 3rd-san..." Others: Everyone senses they have mutual feelings, so they welcome him when he comes over.