Read manga: Itsuka Kamen Wo Nugu Tame Ni ~Warau Kishin To Yumemiru Dorei~

manga
Summary:

A blooming romance between two individuals, as seen through a Demon's mask《Samurai》 Reo Aramogord is the strongest soldier protecting the kingdom, in the middle of the conflict as he was about to destroy his enemy, he fell in love at first sight , a girl who is a "part" of the enemy, A romance story through the "masks" they wear to war.