Cheng Yan travels through time, only to end up becoming an honorable prince in the Middle Ages of Europe. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land. Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders from the realm of evil.
It didn't actually take too much time to test the changes in Scroll's ability after she upgraded.
In fact, she and Anna had already discussed almost everything before Roland arrived—the answers that appeared after the equations weren't her imagination; however, it also wasn't obtained via calculations, but through a search through her memories.
Because there were large amounts of repeated calculations in data that Scroll had once memorized, the answers emerged in Scroll's mind immediately when she coincidentally came across them once more. Especially for those complex functions, if every little small expression among them had been memorized, then the combined expression after shuffling combinations could also be quickly solved, even if she didn't actually understand the equations and their specific meanings.