Sergei Oukoku no Kage Tsukai

In the history of the Kingdom of Siegerland, there has always been a powerful Shadow Messenger who acted as a guardian for the country. Yet the Shadow Messenger himself doesn't have a shadow! Every Shadow Messenger chooses a guardian out of all the knights. In order to show his devotion, the knight then offers his own shadow as a gift to the Shadow Messenger and by that becomes a Swordsman. Lisa is a normal girl who leads a happy life like everyone else, when suddenly her father dies a tragic d...