Horror GLs:
https://www.mangago.me/read-manga/mietemasu_yo_aizawa_san/
https://www.mangago.me/read-manga/the_wind_spell/
https://www.mangago.me/read-manga/murcielago/
https://www.mangago.me/read-manga/liberta/
https://www.mangago.me/read-manga/a_lady_s_table/
https://www.mangago.me/read-manga/strange_tales_of_kisaragi/
https://www.mangago.me/read-manga/kono_ai_wo_owarasete_kurenai_ka/
https://www.mangago.me/read-manga/yoarashi_ni_warau/
https://www.mangago.me/read-manga/seiren/
https://www.mangago.me/read-manga/isekai_picnic/
https://www.mangago.me/read-manga/bead_master/
https://www.mangago.me/read-manga/the_garden_of_plantus/
https://www.mangago.me/read-manga/nekonome_yuuka_wa_kataru_bekarazu/
https://www.mangago.me/read-manga/i_think_you_are_athrea_scans/
https://www.mangago.me/read-manga/mayu_s_song/
https://www.mangago.me/read-manga/paranormal_club_on_the_supernatural_phenomena_of_m_prefecture_s_y_city/
https://www.mangago.me/read-manga/liar_satsuki_can_see_death/ (GL subtext only)
https://www.mangago.me/read-manga/do_you_think_someone_like_you_could_defeat_the_demon_lord/ (violence, gore, slavery, corrupt religious organisation, child abuse)
https://www.mangago.me/read-manga/shura_no_hakoniwa/ (violence, gore, depiction of disassociated personality disorder)
I knew you'd deliver
Gimme HORROR bl and gls PLEASE