No, they're not the same. Story of Seasons is a new series that developed from the Harvest Moon franchise but has some distinct features and gameplay differences.
They aren't identical. Harvest Moon was the original, and Story of Seasons is a continuation with its own tweaks and improvements. The worlds, quests, and overall feel can vary between the two.
One btn sad story could be about a little girl's btn that got lost. It was a special btn from her grandmother. She carried it everywhere as a memento. One day, while playing in the park, it fell off her dress and she never found it again. She was heartbroken.
Btn sad stories are touching because they often represent loss. Just like a lost btn can mean the end of a connection or a memory. It's something small but significant.