Primary

• Naoki Aihara Step-brother of Manami Aihara
• Naoki Aihara Step-brother of Yuuka Aihara
• Naoki Aihara Step-son of Sayaka Aihara
• Naoki Aihara Son of Hiroki Aihara

Extended

• Manami Aihara Wife of Motohisa Aihara
• Manami Aihara Step-daughter of Hiroki Aihara
• Manami Aihara Sister of Yuuka Aihara
• Manami Aihara Daughter of Sayaka Aihara
• Manami Aihara Step-sister of Naoki Aihara
• Sayaka Aihara Wife of Hiroki Aihara
• Sayaka Aihara Mother of Yuuka Aihara
• Sayaka Aihara Mother of Manami Aihara
• Sayaka Aihara Step-mother of Naoki Aihara
• Yuuka Aihara Step-daughter of Hiroki Aihara
• Yuuka Aihara Daughter of Sayaka Aihara
• Yuuka Aihara Sister of Manami Aihara
• Yuuka Aihara Step-sister of Naoki Aihara
• Hiroki Aihara Husband of Sayaka Aihara
• Hiroki Aihara Step-father of Manami Aihara
• Hiroki Aihara Step-father of Yuuka Aihara
• Hiroki Aihara Father of Naoki Aihara