Primary

• Kaname Tsukahara Childhood friend of Yuki Asaba
• Kaname Tsukahara Childhood friend of Yuta Asaba
• Kaname Tsukahara Childhood friend of Shun Matsuoka

Extended

• Yuki Asaba Brother of Yuta Asaba
• Yuki Asaba Childhood friend of Shun Matsuoka
• Yuki Asaba Childhood friend of Kaname Tsukahara
• Yuki Asaba Childhood friend of Chizuru Tachibana
• Yuta Asaba Brother of Yuki Asaba
• Yuta Asaba Childhood friend of Shun Matsuoka
• Yuta Asaba Childhood friend of Kaname Tsukahara
• Shun Matsuoka Childhood friend of Yuki Asaba
• Shun Matsuoka Childhood friend of Yuta Asaba
• Shun Matsuoka Childhood friend of Kaname Tsukahara