Dwaejiui Wang, Aku no Hana Recommendations
School life, with an added unnerving edge rarely seen in fiction. Until the latter stages of The Flowers of Evil's manga, I had thought of it as a sort of fictional suicide note where the normality of life would eventually crush its lead. And the anime amplified that feeling tenfold with the realism added by its rotoscoping (both titles are low-budget yet artistic) and its ambient soundtrack. The execution just gives off a feeling of undefined dread.
Flowers and King of Pigs are different and the same. The emptiness and bleak school life is an obvious linking factor but Flowers relied far more on atmosphere and
Similar art style as well as tone. Both Dwaejiui Wang and Aku no Hana tackle heavy topics. Worth checking out if you are into one or the other. They are also both probably considered 'hit-or-miss,' but I really enjoyed them.
Aku no Hana and King of Pigs share a similar theme of descent into darkness and it brings out the raw inner brutality of someone who is truly evil, while others are faced with a dilemma of watching themselves turn into monsters from a depersonalized perspective.
King of Pigs is dark, and it is nihilistic, but if you follow that philosophy you might see the beauty of it. It is in no way meant to actually illustrate that evil triumphs good, it is just to show that evil is there, and some people handle its presence differently.