Any really fucking depressing/horror story with no romance??? No cringy/edgy stuff please ...

Bastard
Misu Misou
Oyasumi Pun Pun
Pygmalion
http://www.mangago.me/readmanga/koukai_no_nai_jinsei_wo/
http://www.mangago.me/read-manga/shii_chan/
http://www.mangago.me/readmanga/shiawase_wo_anata_ni/
(These links are stories made by the same author btw n it’s really good! Check em out n his/her other works too)

http://www.mangago.me/read-manga/efforts_never_betray/

http://www.mangago.me/read-manga/shiawase_wo_anata_ni/ also every single story by this author...
2. Horizon