Primary

• Kiriko Ise Classmate of Itsuki Hinokawa

Extended

• Itsuki Hinokawa Step-son of Yoshino Hinokawa
• Itsuki Hinokawa Step-brother of Jun Hinokawa
• Itsuki Hinokawa Cousin of Natsuki Hinokawa
• Itsuki Hinokawa Classmate of Kiriko Ise