If you're looking for anime similar to Mitsuhiro Hidaka: Role Playing Soldier, you might like these titles.
After a harrowing period of war, the countries of Valcania, Dulkheim and Igrecias formed a confederation and began a new system of political order, but were met with great resistance. Now, in Valcania's capital, a rebellion is being planned to overthrow the current system of government, and only Lady Silvernale, captain of the guard, has the power to stop it. Along with delegates from Igrecias and heroes alike, she must do whatever it takes to keep the country from being caught in the middle of a brutal war, even if it means fighting those she has sworn to protect...
This is the story of the Chain Chronicle, a book that describes everything that happens in the world. The citizens of the remote continent of Yggd once thought that there was nothing beyond their continent. The continent was divided into several regions, each with its own king. Though there were small skirmishes amongst them, a lord, chosen by the kings in conference, always maintained balance, until the evil Black Army arrived. The Volunteer Army, led by Yuri, was no match for the Black Army. During the fighting, the Lord of Black captures half of the Chain Chronicle, as well as the capital.
In a world where people and monsters are at odds, some learn to coexist. Known as Riders, they awaken the powers of monsters and live alongside them in secrecy. Now, one young boy journeys to find his own companion and become the world’s greatest Rider.
Ires and his father, Leglight are peddlers. Near Gramnoa, they met a genius "tempest", Yuan. Yuan thinks they are bandits, and began to fight. Leglight wields his mystic weapon, and beats him back. However, right after that, he is swallowed into black light leaving the weapon, a "device", and a message, "Visit Oldman in Gramnoa". To look for his father, he leaves for Gramnoa.
Prince Mars doesn’t act like a typical heir of Aritia; he spends his time with the like-minded Princess Sheida of Talus, wasting away the days on childish pursuits. However, the young prince can never forget the sacrifice made for him by his beloved sister and a flame still burns in his heart for the homeland he has since been exiled from. Rallying his people, Mars steps forward to liberate the spirit of Akanea, the only one who can once again bring freedom to the nation. Unfortunately, this means taking on the might of the Durhua Empire and all that stands between the two lands...