Chi. Chikyuu no Undou ni Tsuite

In 15th-century Europe, young prodigy Rafał has learned that the safest path to success is to accept the truths society already honors. He is expected to study theology, the most prestigious field of his age, until a mysterious encounter leads him toward a far more dangerous question: what if the Earth moves around the Sun?

This is not merely an academic disagreement. Such ideas can be branded heresy and bring torture or death upon those who pursue them. Yet Rafał finds a beauty in the motion of the heavens that he cannot dismiss. His secret search for calculations and evidence begins a chain of conviction passed from one person to another, linking people willing to risk everything so that a truth does not vanish simply because the world is afraid to face it.