Chi. Chikyuu no Undou ni Tsuite

Set in 15th century Poland, the series follows Rafal, a gifted twelve-year-old driven by a desire for societal approval and intellectual validation. He publicly declares his ambition to study theology, the most respected academic pursuit of the time. However, a chance encounter ignites a fervent passion for astronomy, challenging his carefully constructed rational worldview.

Rafal becomes consumed with validating heliocentrism – the revolutionary idea that Earth orbits the Sun – a concept vehemently opposed by the Church's established geocentric doctrine. His scientific pursuits are fraught with peril; pursuing evidence for his theories demands meticulous research and clandestine experimentation to avoid the brutal consequences faced by those deemed heretical. The anime explores themes of faith versus reason, intellectual freedom, and the courage required to challenge deeply entrenched beliefs within a restrictive society.