Newton to Ringo no Ki

Shuuji and his childhood friend Yotsuko were tracking down his missing grandfather when they suddenly traveled back in time to the 17th century. He destroyed an apple tree upon his arrival in front of a young girl with small breasts. But what he did not know was that she would later be known as the father of modern science, Sir Isaac Newton!

Because of his untimely actions, the world was deprived of the discovery of universal gravitation. Would he be able to correct history and return to the present?