Sakigake no Hanamiko

The manga is set in a world where gods of calamity who bring disasters to humankind exist, and girls known as "Hanamiko" fight against them. The manga centers on Arata Kamishiro, a replacement high school teacher who takes the opportunity of his father's death to try and become the leader of a group of Hanamiko. What he didn't expect is that he would be assigned to a group of Hanamiko that may be more trouble than they're worth.

(Source: ANN)