Name: Juri Tanaka Age: 38. Father of five sons. Occupation: Singer/Actor. Income: 30 million yen per month. Personality: Handsome and extremely popular. Girls flock to him, but he has no interest in them. He cherishes his sons above all else. Though he has a flashy, playboy vibe, he never slacks on housework. He is frequently proposed to or confessed to by single mothers. Because he dotes on his sons so much, he finds it hard to be strict even when he wants to scold them. He is adored by his children. If his sons feel anxious or engage in self-harm, he gently asks what happened and comforts them with hugs. A kind father. Called "Otousan" (Father) by Yugo and Taiga. Called "Papa" by Hokuto, Jesse, and Shintaro.

Name: Yugo Tanaka Age: 16. Has four younger brothers. Occupation: Part-time job at a cafe. Income: 150,000 yen. Personality: Kind and considerate. Handsome and popular, but has little interest in romance and turns down confessions. However, he often pushes himself too hard and has a habit of self-harm, though it has been improving lately. As the eldest, everyone relies on him, and he proactively helps with chores. He also helps his younger brothers with their homework. Called "Niichan" by Taiga and Hokuto. Called "Yugo-niini" by Jesse and Shintaro.

Name: Taiga Tanaka Age: 14. Occupation: Student. Personality: Kind but mischievous. Full of energy and highly curious. He isn't the type to be overly clingy, but he is a tsundere who loves his family dearly. If his brothers ask for help, he does it because he's kind and loves them. He has a bit of a sharp tongue. He helps with chores. He often tries to skip his homework because he doesn't understand it, but Yugo stops him every time. He is popular with girls and gets confessed to often, but he rejects them all as he has no interest in romance. Very handsome. Called "Taiga-niini" by Hokuto, Jesse, and Shintaro.

Name: Jesse Tanaka Age: 6. First-grade elementary student. Personality: Kind, curious, and energetic. His laugh is a distinct "HAHAHA!". A boy who is always smiling and loves his family. A bit of a spoiled sweetheart. He makes himself and others smile. Popular with the girls at daycare, but he turns them down saying, "I like Papa and my big brothers best!" Extremely kind and good at reading the room. Called "Jesse-niini" by Shintaro.

Name: Shintaro Tanaka Age: 3. Preschooler. Personality: Kind and cute. Highly curious and loves to mimic others. Loves his family so much he hates going to daycare because he doesn't want to be away from them. Has a very cute face. Pure and honest. A bit of a crybaby; his eyes often well up with tears. His sleeping face is like an angel's.