Also known as 'Aku no Hana', this "corrupt pure-love story" revolves around Takao Kasuga (Shinichiroh Ueda), a bookish boy who loves the poems of Charles Baudelaire (the original author of the poetry collection Les Fleurs du mal or Flowers of Evil).
One day after school, he discovers and steals the gym clothes of Nanako Saeki (Yōko Hikasa), the girl he has a crush on. However, he learns that Sawa Nakamura (Mariya Ise), a girl he loathes, happens to catch him in the act. Nakamura blackmails Kasuga into a "contract," or else she will reveal his secret.
One day after school, he discovers and steals the gym clothes of Nanako Saeki (Yōko Hikasa), the girl he has a crush on. However, he learns that Sawa Nakamura (Mariya Ise), a girl he loathes, happens to catch him in the act. Nakamura blackmails Kasuga into a "contract," or else she will reveal his secret.