How to Marry Harvest Goddess in Harvest Moon: Hero of Leaf Valley

Unlike some Harvest Moon series, Harvest Moon: Hero of Leaf Valley lets you marry with the Harvest Goddess (HG). But you only have one chance to do it and lots of requirements you have to fulfill. Besides being difficult to make Harvest Goddess turns into a human, to propose to her is also very different from another woman. So you have to learn it first. Requirements for Harvest Goddess