Miriam荒野の天使ども; 荒野天使; Angel of the Wilderness; Angels of the Rough Plains; Kouya no Tenshidomo; Koya no Tenshi domo

This is a cowboy shoujo manga set in the Wild West. Miriam is an orphan. Her father was a drunken gambler; she only had a dress and they moved from place to place, until one day her father died and Grace took her in. The series follows Miriam's life, growing up, and falling in love with her life-long friend, the skillful sharpshooter Douglas. First of the Miriam series (3 volumes), followed by sequels Jikan wo Tomete Matteite (3 volumes) and Sore nari ni Romantic! (1 volume). Seven volumes total