Read manga: Zero (Toume Kei)

manga
Other name: ゼロ ; ゼ0
Genres: Drama ; Seinen
Artists: Toume Kei
Status: completed
Latest chapter: Vol.1 Chapter 3
Updated at: Aug 25, 2019
Summary:

In the middle of a high school assembly, all of the students suddenly collapse. The one behind it all is a girl named Mao who holds a grudge. She's out for revenge against the entire school!