Konna Jinsei wa Zettai Iya da

Saki is an ordinary high school girl, living a simple life of striving at her studies. The problem is she does not have a good relationship with her parents, and they lash out at her because of it. One day, scared of a group of delinquents who noticed her at school, she accepts and smokes a single cigarette, and somehow she and the delinquents get along comfortably. Troubled by her relationship with her parents, Saki flourishes in her time with the delinquents. That was when the tragic events began. What will become of Saki's life? A suspense tragedy about a quick descent from familiar everyday life!

(Source: Hakusensha, translated)