Really fucked up webtoons? Like very disgusting and disturbing. I want to have nightmares
http://www.mangago.me/read-manga/feeding_lamb/
One of my favs
It's not a webtoon and it's not that scary, but it is kind of disturbing so I'm going to leave it here for ya.
http://www.mangago.me/read-manga/ogeha/
Crazy Serial killer manga or a justice killer?
http://www.mangago.me/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/
Thanks but I'm already reading it . Maybe any hidden gems, anything to do with killers/serial killer
http://www.mangago.me/read-manga/obey_me / http://www.mangago.me/read-manga/warehouse/ ?
Read both of them too. But thanks
http://www.mangago.me/read-manga/fukushuu_kyoushitsu/
http://www.mangago.me/read-manga/the_hero_who_seeks_revenge_shall_exterminate_with_darkness/
http://www.mangago.me/read-manga/pumpkin_night/
http://www.mangago.me/read-manga/killing_morph/
and this one http://www.mangago.me/read-manga/sekai_oni/
Uhhh Thanks! I didn't read this one