Sadistic Beauty p1. And p2.
This was the only bl I've read that made me feel sick to my stomach. Read the trigger warnings!!
https://www.mangago.me/read-manga/kegare_no_nai_hito/
These are in a similar vein too, not as bad as the above though:
https://www.mangago.me/read-manga/shintan_kairou/
https://www.mangago.me/read-manga/oni_wa_warau_ka/
Holy shit the first one was roughhhh
Ryouki Keiji Marusai
someone give me the most diabolical traumatizing story you've read,
no limits js give me the worst of the worst