Primary

• Kousuke Seto Adoptive brother of Shuuya Kano
• Kousuke Seto Adoptive brother of Ayano Tateyama
• Kousuke Seto Adoptive brother of Tsubomi Kido
• Kousuke Seto Adopted son of Kenjirou Tateyama

Extended

• Tsubomi Kido Adopted daughter of Kenjirou Tateyama
• Tsubomi Kido Adoptive sister of Kousuke Seto
• Tsubomi Kido Adoptive sister of Shuuya Kano
• Tsubomi Kido Adoptive sister of Ayano Tateyama
• Shuuya Kano Adoptive brother of Kousuke Seto
• Shuuya Kano Adoptive brother of Tsubomi Kido
• Shuuya Kano Adoptive brother of Ayano Tateyama
• Shuuya Kano Adopted son of Kenjirou Tateyama
• Ayano Tateyama Adoptive sister of Kousuke Seto
• Ayano Tateyama Adoptive sister of Shuuya Kano
• Ayano Tateyama Adoptive sister of Tsubomi Kido
• Ayano Tateyama Daughter of Kenjirou Tateyama
• Kenjirou Tateyama Teacher of Takane Enomoto
• Kenjirou Tateyama Adoptive father of Shuuya Kano
• Kenjirou Tateyama Adoptive father of Kousuke Seto
• Kenjirou Tateyama Adoptive father of Tsubomi Kido
• Kenjirou Tateyama Father of Ayano Tateyama
• Kenjirou Tateyama Teacher of Haruka Kokonose