Side stories included in the "Kingdom: Highlights" books:

Volume 1:

1. Kongou (金剛)
   
2. Umazakehei Sanbyaku (馬酒兵三百)
   
   Volume 2:
   
3. Li Mu(李牧):
   An insight to the past of Li Mu and Hai Yin as they resist the forces of the Xion Nus.
   
4. Meng Wu and Chu Zi (蒙武と楚子)