Manga Doa

Little Shion has a secret: he's the reincarnation of a man from another world who died longing for magic! Hoping that he might at last harness the power of magic in this new world, he finds that magic doesn't exist here either. But when Shion visits a lake with his sister, he witnesses a mysterious phenomenon that seems like the magic he yearns for! If magic does not exist, can he make it himself? (Source: Seven Seas Entertainment)

Faerie-born Jack Flash and her human-born brother, Larry, run a detective agency in New York City specializing in crimes committed in the hazy boundary between the human and faerie realms. They never expected to receive a letter from an ancient magus of the Old World, but Echos, caretaker of dragons, has a task for them. (Source: Seven Seas Entertainment)

Rising from the ashes, a fallen noblewoman stands to save humanity! "Countess Romelia. I'm breaking off our engagement," declared Prince Henri, right after defeating the Demon King. By the prince's side were Saint Elizabeth, the sage Ekaterina of the Unreturning Forest, and the Eastern swordswoman Lu Hime, all pointing accusatory fingers at her as "useless." But the prince and his comrades didn't know something. They didn't know that Romelia possessed a miraculous power called "Grace," which bestows good luck. Having lost her fiancé and been abandoned by her friends, Romelia did not break. Her homeland was still infested with the Demon King's forces, and many people were held captive by the demon race as slaves. To rescue them, Romelia embarked on a mission, encountering numerous difficulties along the way. First, she didn't have an army. There were no healers to tend to injuries, and she lacked the funds. But Romelia was determined to solve every problem aggressively. "No army? Let's intimidate local lords and take their forts." "No healers? Let's negotiate with the church for their assistance." "No money? Let's negotiate with merchants to secure funds." "Newly recruited soldiers are inexperienced? Let's have them gain experience by hunting monsters." And so, Romelia, along with her loyal followers, marches into battle! (Source: Shogakukan, translated)

The story covers the formation and origin of Peaky P-key, during their first year of middle school. (Source: D4DJ Wiki)