HARAHARA SENSEI is an action-packed and exciting manga with an explosive story about a chemistry teacher and her dangerous experiments. It follows the ingenious and vengeful Azusa Tsukumo, who uses her home-made bomb to defend herself against the injustices done to her. But she is not the only one hiding a secret...

What awaits you in volume 4:
Azusa and Yoroizuka want to make contact with "the man" in search of clues about the person with chemical expertise. Meanwhile, the development of a terrible chemical weapon that Inaba wants to use against Azuba out of the blackest of feelings continues. Will Negami's plan be stopped before the fateful "deal" is made? Once again, arch-enemies Azusa and Inaba, as well as Yoroizuka and Negami, face off to put an end to the curse of their past.
The hard-boiled action story of yakuza versus chemist reaches its grandiose climax!

For fans of action, drama and mystery manga!