It will be revealed on the 7th volume of Kentarou Satou's Mahou Shoujo Site (Magical Girl Site) manga that the series will be receiving a TV anime adaptation in 2018.

Synopsis
Asagiri Aya is a young girl who has fallen victim to bullies at her school. Looking for a way to escape her troubles, she looks to the internet for distraction, when a mysterious website called "Magical Girl Site" appears. Simply viewing the page is all it takes to hurtle Aya headlong into the deadly world of the Magical Girl Apocalypse. There, it’s fight or die, against a seemingly endless array of savagely adorable, frilly-skirted killing machines, each armed with magical powers and an unquenchable thirst for blood and chaos. (Source: Seven Seas Entertainment)

Mahou Shoujo Site began its publication in Akita Shoten's Champion Tap! in July 2013 and currently has six volumes in print, with the seventh volume going on sale on September 8. Seven Seas Entertainment has been publishing the manga in English since February 2017, and released the third volume on August 1. The serialization will also be moved to Weekly Shounen Champion in October 2017.

Source: Otakomu

Mahou Shoujo Site on MAL