Girls Dead Monster is one of my favorite Japanese female rock band. They were first formed by 4 female high school students who lost their way of life, but then music leads them to a new path of life and they finally met up and formed the private band in the school, it was called Girls Dead Monster. After a several months they've practiced, they’ve put up a concert on the school to gain the students’ approval as the school’s rock band. After a several songs played in the concert, the school loved it and Girls Dead Monster was officially the school’s band and gained the entire school’s attraction. 3 months after the concert, Iwasawa, the vocalist-guitarist died due to that she suffered a brain disease. However, the band wouldn’t end here, they’ve put up an audition to the students in the school to volunteer as the new Girls Dead Monster’s new Vocalist-Guitarist. A hyperactive girl named Yui was chosen as the new Vocalist-guitarist. This band was dedicated to the Angel Beats anime.