We follow Imoto Haruhisa, a 50-year-old maths teacher so famous people come from across the nation to observe his classroom. From a top-level school to a foster care facility, he encourages students to shine in classes praised as "magical" and "miraculous." His unorthodox lessons never use textbooks or require taking notes. How does this approach help students build their thinking skills? Through Imoto's "ultimate philosophy of learning," we find many hints applicable not only in education, but for raising children and personnel development as well.