In the Ai o Yakusoku Sureta Machi (Heart of Texas) series:

from fictiondb:

V.1 - Ghost Town no Bara (Lonesome Cowboy)
Everyone in Promise thinks Savannah Weston is an old-fashioned kind of woman, quietly content to stay on the family ranch with her brother Grady. But Savannah has her passions--for the old roses she loves to grow, for the children she hopes to have. And for a man named Laredo Smith. He's a stranger to Promise, a disenchanted cowboy who may just change Savannah's life.

V.2 - Kouun o Yobu Kiss (Texas Two-Step)
Ellie Frasier needs her friends. She's still mourning her father, still learning to run the business he left her -- Frasier's Feed Store, in Promise. She knows she can count on the people here for comfort and support, laughter and friendship...But now her long-standing relationship with one of those friends -- rancher Glen Patterson -- seems to be changing, turning into something else. Love?

V.3 - Machiwabita Kokuhaku (Caroline's Child)
Who's the father of Caroline's child? Everyone in Promise wants to know, but no one's ever asked -- or ever will. Maggie's five now, and Caroline Daniels has kept her silence all these years. It doesn't change how the people in this community feel about Caroline. They're protective of her and Maggie; they care. Especially rancher Grady Weston, who's beginning to realize he more than cares.

V.4 - Seibu no Princess (Dr. Texas)
They call her Dr. Texas. She's Jane Dickinson, a newly graduated physician from California who's working at the Promise clinic—but just for a couple of years. They call him Mr. Grouch. Cal Patterson was left at the altar by his out-of-state fiance, and he's not over it yet. Too bad Jane reminds him so much of the woman he's trying to forget!

V.5 - Saisho de Saigo no Love Letter (Nell's Cowboy)
Nell Bishop, widowed mother of two children, is turning her property into a dude ranch. And one of her first guests is Travis Grant, an Easterner known for his books about the West. Her kids are crazy about him—and she could fall for him herself. But it's too soon for her.

V.6 - Shukufuku no Uta ga Kikoeru (Lone Star Baby)
With a little effort, nothing is impossible.

Wade McMillen might be a minister, but he’s also a man. An unmarried and very attractive one. Is it as a man that he responds to the lovely young woman who shows up in Promise, pregnant and alone? Or as a man of God? Maybe it’s both. Amy Thornton hopes to make a new life for herself and her baby, and to do that, she needs Reverend McMillen’s help, his compassion. What she wants is the love of a man named Wade…