Megu☆Megu Singer Song Fighter (Manga)

is a Japanese manga series written and illustrated by CAFFEIN. The manga was serialized in the Comic@Loid magazine and published in Japan by ASCII Media Works under the Dengeki Comics NEXT imprint from March 2014.

Synopsis
This is the (imaginary) beginning story of the crazy popular Vocaloid Character GUMI!! By some freak incident, the now cyborg school girl has her eyes set on her idol debut as "Gumi" under the mysterious organization, "Intane Group"!?

(Source: Manga Updates)