http://www.mangago.me/read-manga/unfather/?wgTU - total wreck
Read anything by Harada
That's the real psychological manga right there
Killing stalking is the only one I know but hope it helps
Harada playlist:
(One-shots):
http://www.mangago.me/read-manga/poison_and_sex/
http://www.mangago.me/read-manga/yugami_hajime/ (prequel)
http://www.mangago.me/read-manga/kyoushitsu_no_yugami/ (sequel)
http://www.mangago.me/read-manga/hikizuru_oto/ (my absolute favs, I hope you'll read this one)
(Non-oneshot):
http://www.mangago.me/read-manga/nii_chan_harada/ (super dark, contains pedophilia, and grooming)
http://www.mangago.me/read-manga/yatamomo/ (pretty fluffy considering her other works, still contains child prostitution, rape, and prostitution)
http://www.mangago.me/read-manga/color_recipe/ (stalking)
(Doujins):
http://www.mangago.me/read-manga/gintama_dj_mienai_kusari/ (this is top-tier I freaking love this, this is so MESSED UP in so many levels, pls do read with caution)
I seen killing stalker, the perfect realationship ,hit on by a kinky guy, blood bank , Hogu Hagyeongsu , hide and seek ,Incidentally Living Together , black mirror , warehouse , body complex , dispar but I need new ones and read any of these I say there all good reads expect for hit on by a kinky guy