Fortified School

A reform school for juvenile delinquents established in 200X is actually a government-sponsored laboratory, which makes ultra-human warriors with genetic modification. Three new kids enter the school. Itsuki, who is actually a girl dressed as a boy so she can get into the school to look for her lost brother; Mei, a very quiet, mysterious boy; and Gentaro, an energetic boy who is easily elated by flattery. The three revolt against the school rules and cause the other students to riot. The school turns into a battlefield. This is a school action manga, depicting the integrity and friendship of young men.

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