Boku no Pico
Of u r ok with Yaoi, this one is extremely disturbing (like seriously disturbing)
https://www.mangago.zone/read-manga/hogu_hagyeongsu/
If you don't mind yaoi, https://www.mangago.zone/read-manga/sura_s_lover/
(it starts off mildly sweet in the start but gets dark later on)
*If
https://www.mangago.zone/read-manga/black_lotus/
(The uke is treated very badly)
https://www.mangago.zone/read-manga/kedamonotachi_no_jikan/
https://www.mangago.zone/read-manga/rapunzel/
https://www.mangago.zone/read-manga/risou_no_kareshitachi/
https://www.mangago.zone/read-manga/feeding_lamb/ (this one has a lot of gore)
https://www.mangago.zone/read-manga/human_chair/
https://www.mangago.zone/read-manga/children_can_t_choose_their_parents/
Also anything by Harada!
Idk if y'all tryna keep them up all night or ruin their life instead-
I mean they did ask for disturbing stories... Ik they might be extreme (╥﹏╥)
That's right ( ´･･)ﾉ(._.`)
I'm looking for disturbing mangas that will keep me at night