Magical Girl Site

Mahō Shōjo Site (魔法少女サイト), is a manga series written and illustrated by Kentaro Sato. It is published since July 4, 2013 in the magazine Champion Tap! of the Akita Shoten, and then moved to the magazine Weekly Shōnen Champion from the same printing company in 2017, being compiled in 12 volumes tankōbon till the date. The series is a spinoff of Mahou Shoujo of the End.

On September 8, 2017, an anime adaptation of production dóA was announced in the magazine Bessatsu Shōnen Champion. It is broadcast from April 6, 2018.

Mahō Shōjo Site Sept (魔法少女サイトSept) is a manga series written by Kentaro Sato and illustrated by Toshinori Sogabe. It is published in the Champion Tap magazine! of Akita Shoten since October 26, 2017 and will end on August 29, 2018 with a total of 10 chapters published. The series is a Spin-off of Mahou Shoujo Site.

Plot of Site
Aya Asagiri is a middle school student who has problems at school because of bullying and at home because of her brother's physical abuse. While browsing the web, a website showing a terrifying person suddenly appeared. This person seems to feel sorry for her, and announces that she will give Asagiri magical powers.

Then, she is cornered by the bullies at school, and with nothing to lose, she fires a weapon that mysteriously had appeared in her locker earlier that day. The shot makes the bullies disappear, but to her horror she discovers that they had been run over by a train.

Asagiri feels that she killed them, and is confused to see that now she has long red hair and eyes that cry blood. Then she discovers that she is not alone when one of her classmates reveals that she is also a Magical Girl.

Asagiri learns from the Magical Girls, and from the power she has acquired from her new friend who offered her help. Although the two girls can not explain why there is something that looks like a countdown on the website, and they fear it's a bad thing.

Plot of Sept
Tsurara Takahashi is a middle school student who belongs to the Shinzen tennis club. However, she carries a great misfortune that she can not confess to her friends: she met the mysterious Magical Girl Site and was given a magic stick in the shape of an electric drill.

This spin-off series can also be referred to as Nana 's origin story, Nana being Hyoka Nagatsuki‎.

Official
Akita Shoten Seven Seas Entertainment Official anime page