or something like a psychological thriller. thank you!
I just finished reading this anime+movie 2 days ago. I think all have seen this already except me

but anyways, have you tried "Death Note"?
My friends have been recommending me to see the movie or at least read or watch the manga/anime since it's very good but I'm not really the type to read shounen =.= It took me 2 years to actually watch the movie (and that happened 2 days ago). It's sooooo good! I regretted ignoring it for 2 years.
Death note is about a highschool genius who is bored with his life and just want some changes to it. He keeps saying "The world is rotting"; then he saw a notebook falling off ground. The book is titled "Death Note". Anyone who writes a name of a person in that book will die. He thought it was just one of those chain letters; he tested it with killing a criminal he saw on TV. It worked. Now he's infamous with killing every criminal he sees on TV or internet. Someone is about to stop his "devilish" act. This now turn into a battle between the self-proclaimed god and the self-proclaimed justice.
I enjoyed watching both anime and movie as they do twist my mind. LMAO. Both leading characters are trying to read each other's mind and the winning one sure is smarter and tricker. Just one mistake from their psychological analysis, that opponent is totally done for.
I am not a fan of shounen anime/manga but this is one of those that really amuses me. I'm currently reading the manga. ^^
can someone recommend me a mature manhwa? or manga?
with beautiful drawings and taboo and dark love?
here are some mangas ;)
Tsumi Ni Nureta Futari - It's about a girl who went to Rome after her break up with her boyfriend. There she finds a Japanese man who yelled at her faults. Sometime during her stay, this guy and her had a one night stand. When she returns, her mom introduced to her long lost younger brother and that younger brother is non-other than the guy she slept with in Rome O.O
Boku wa Imouto ni Koiwosuru - It's about a boy who just can't stop his feelings for his twin sister. I`d say this one has more twisted story compared to "The Flower of Evil". Or maybe they're just as the same?

because in this manga, you get to know what's running in the main guy's mind; like how much he wanted and long to sleep with his sister and what not.
They are all smuts ^__^ so if you don't mind reading mangas with graphic-sex, then i really suggest you read these two mangas. I like Tsumi ni Nureta Futari among all the taboo manga/manwhas i read.