Genocider Mami

Google translation from Amazon.co.jp description: Seventeen years ago, seven subjects of the Japanese government's Siegfried project went missing, calling themselves phantoms and hitting the government with a challenge. The murderer, Mami Kurusu, gets into Kuzu High School, which seems to be phantom-related! ?? The Doujinshi & Manga Lexicon [Vol. 1](https://www.doujinshi.org/book/293410/) [Vol. 2](https://www.doujinshi.org/book/293420/) Vol. 3