Chiguhagu Shoujo no Dialogue

is a Japanese manga series written and illustrated by Meno. The manga was serialized in the Dengeki Daiouji magazine and published in Japan by ASCII Media Works under the Dengeki Comics NEXT imprint from November 2014.

Synopsis
Mugi Ichinose and Midori Ichinose are twin sisters. However, the appearance and contents are exactly the opposite. My sister Mugi is a weak and serious honor student. My sister Midori is the strongest yankee who keeps her crying child silent. Such two people will be replaced when they enter high school !?

(Source: MangaHelpers)