^ While I am also super excite for Stardew Valley, there's also
World's Dawn on Steam now. If those are features you're looking for, it's worth looking into as well. :3
There's obvious Harvest Moon influence, but I hear they put a lot more effort into the writing; the characters and the story are deep, but the farming aspect itself is pretty shallow.*
Also goes a step beyond HM/Story of Seasons by allowing you to marry anyone, as Stardew does. (tho it seems to do that by asking your sexual orientation at the beginning; I am unsure if you can be bi or if it's strictly straight/gay).
*The dev(s) seem pretty committed, tho. It only released a week ago and they just updated it with double the farmland after people complained it was leaning too far into a dating sim realm - there wasn't enough farming to be done.
It's an RPG Maker title so I'd usually give it a pass just on that alone, but the reviews are making me consider nabbing it. lol
There is also
Our Love Will Grow but you can only play as a boy and date girls.
"For the story." It's also a land of eternal summer, but on the flip side it's a much larger world and you have infinite pocket space. Basically, if you need more HM-likes in your life, it's already cheap and it's regularly discounted, lol.