"Flowers of Evil" is a Japanese manga series written and illustrated by Shūzō Oshimi. It follows the story of Takao Kasuga, a high school student who becomes infatuated with a classmate named Nanako Saeki. After impulsively stealing her gym clothes, he finds himself entangled in a web of guilt and desire, leading to a complex relationship with Sawa Nakamura, a mysterious girl who discovers his secret. The series explores themes of adolescence, morality, and the darker aspects of human nature. It is known for its psychological depth and unique art style, making it a notable work in the seinen genre.