Akachan Ryuu no Osewagakari ni Ninmei Saremashita

Akachan Ryuu no Osewagakari ni Ninmei Saremashita manga summary: 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!