Erio to Denki Ningyou is a Manga/Manhwa/Manhua in english language, Adventure series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

The story centers around Anjie, an electric doll, and Erio, a human raised by her. In order for Erio to experience the outside world, the two set out on a journey.