Harahara Sensei is an action-packed and thrilling manga with an explosive story about a chemistry teacher and her dangerous experiments. Follow the brilliant and vengeful Azusa Tsukumo as she fights against the injustices done to her with her homemade bomb. But she is not the only one hiding a secret.

What to expect 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 continues, which Inaba intends to use against Azusa out of his darkest feelings. Will Negami be able to stop his plan before the fateful "deal" takes place? Once again, the 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-hitting action story of Yakuza versus Chemist reaches its grand climax!

For fans of action, drama, and mystery manga.