Tobacco Toka Suwana Souna Kouhai

A yuri manga that begins with a single cigarette shared between a plain kouhai and a privileged sempai—

Kuromi Yamamoto is a quiet and unassuming member of a college club. Shiori Shiratori is an upperclassman in the club who seems to be blessed with good looks and a happy life. But after catching a glimpse of Kuromi’s “true nature,” Shiori’s life begins to spiral out of control…

(Source: booth, translated)