Worthplaying: Story of Seasons is the latest entry in the Bokujou Monogatari franchise, which is traditionally known in North America as Harvest Moon. It's both a sequel and a new IP, but Story of Seasons is a Harvest Moon game in everything but name only.
The confusion around Story of Seasons and Harvest Moon explained.
"Marvelous Europe Limited are today excited to announce that the beloved life simulation and farming franchise STORY OF SEASONS, known as Bokujou Monogatari in Japan and previously known as HARVEST MOON in the west, is celebrating its 25th Anniversary this month." - Marvelous Europe.
Pioneers of Olive Town has some striking differences that expand upon gameplay, but also several subtler alterations that make it just that bit smoother to play.