The dog trainer Yui was summoned into another world as a "Guiding Hand" to raise a baby dragon. The dragon is a "Holy Dragon", who have protected the humans from the invading demons for many generations!
Akachan Ryuu no Osewagakari ni Ninmei Saremashita is a completed manga by Kusano Setsuri, first published in 2015. It blends romance, isekai, drama and fantasy. You can read all 14 available chapters of Akachan Ryuu no Osewagakari ni Ninmei Saremashita online for free on MangaPulse; the newest is Chapter 14, added 2020-09-23. The series is finished, so you can read it from start to end in one go.