Primary

• Takeru Yukawa Former student of Hideto Tange
• Takeru Yukawa Friend of Shin Nishida

Extended

• Hideto Tange Former teacher of Takamichi Gamou
• Hideto Tange Former teacher of Sora Egami
• Hideto Tange Former teacher of Kunihiko Yagami
• Hideto Tange Former teacher of Tamayo Shiina
• Hideto Tange Former teacher of Nozomi Bitou
• Hideto Tange Former teacher of Akie Takasugi
• Hideto Tange Former teacher of Yuzuki Mikage
• Hideto Tange Former teacher of Itsuko Hiraishi
• Hideto Tange Former teacher of Takeru Yukawa
• Shin Nishida Friend of Takeru Yukawa