Takahiro was planning on making Akame ga Kill into an adult Visual Novel at first before he decided to turn it into a manga instead.
This Anime is going a different path unlike the source material
Based on is a Japanese manga series written by Takahiro and illustrated by Tetsuya Tashiro. It was serialized in Square Enix's Monthly Gangan Joker from March 2010 to December 2016, with its chapters collected in 15 tankobon volumes.