dark and twisted

Try Itou-San by Kuraka Sui

MADK
http://www.mangago.me/read-manga/madk/

Thank you, I*ll check it out

Also very good ^^

sadly one-shot (short) but luve this
http://www.mangago.me/read-manga/nick_one_piece_dj/ and
http://www.mangago.me/read-manga/color_recipe/
no gore, but dark, psychological, a good one
http://www.mangago.me/read-manga/my_god/
lil bit messed up (prob. you know it already)
http://www.mangago.me/read-manga/host_in_down/
http://www.mangago.me/read-manga/kanpai_dj_unapai/

I love that one! could be a bit more detailed in some scenes...

I know color recipe, host down and the kanpai_dj_unapai (that one was the right amount of f*ed up). I'll check out the one piece dj and my god. Thank you!

guess you can find more "f*ed up" XD stories on myreadingmanga....
I "like" this one. story is pretty good (no happy ending, romance or something) just dark and depressing
https://myreadingmanga.info/gengoroh-tagame-whats-inside-chest-eng/
this one... ugh thats... bizare? not really my taste but since you like messed up stuff
https://myreadingmanga.info/madobuchiya-nishin-chikuhyou-no-hanayome-orc-bride-eng/

Check out Ogawa Chise

Thanks for the recommendations. I know both of them. The chest one was really hardcore, it gave me the chills.