You may or may not know bout killing stalking, its dark n mature
And a new one called obey me
Sorry, ive only read this two
How dark you want? Check works from Harada sensei, Ogawa Chise sensei and from Nishida Higashi like http://www.mangago.zone/read-manga/tenshi_no_uta_nishida_higashi/ Or something really fucked up like http://www.mangago.zone/read-manga/cold_rain_of_happiness/
http://www.mangago.zone/read-manga/kanpai_dj_unapai/
http://www.mangago.zone/read-manga/kokoro_o_korosu_houhou/
Check also this list
http://www.mangago.zone/home/mangalist/385390/
Oh thanks guys Hahahaha
Guys recommend me some dark/mature or bdsm stuffs but BL HAHAHAHAH im so reall into this kind of genre