Black arm of shooting iron (1-3 volumes)

Publisher: Kodansha
Author: Yunika Shibata
Size: 112mm x 174mm
Number of books: 3
Language: Japanese
Category: Shonen manga, manga
Latest publication date: 2012-05-09

Synopsis:
The high school student, Tetsuya Kurokawa, had a mediocre but happy everyday life with his parents, Keiko Mihara. One day, a beautiful girl, Nao Amamiya, is transferred to Tetsuya's school. Then, that night, I was waiting for Tetsuya who returned home was Keiko, who fell because of blood, and a strange man whose arm turned into a huge knife! Nao appeared there and urged Tetsuya to make the ultimate choice. ! "Can you stop being a person to protect important people?"