Horror GLs:
https://www.mangago.me/read-manga/the_wind_spell/
https://www.mangago.me/read-manga/mietemasu_yo_aizawa_san/
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/do_you_think_someone_like_you_could_defeat_the_demon_lord/
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/liar_satsuki_can_see_death/ (GL subtext only)
https://www.mangago.me/read-manga/smile_it_s_just_a_dream/ (one-shot)
https://www.mangago.me/read-manga/i_m_bound_by_miho_chan/ (one-shot)
https://www.mangago.me/read-manga/game_of_murder/ (one-shot)
https://www.mangago.me/read-manga/happy_end_for_you/ (one-shot)
https://www.mangago.me/read-manga/yabai_hito_ni_hitomebore_suru_hanashi/ (one-shot)
https://www.mangago.me/read-manga/i_love_you_hanatsu_yaya/ (one-shot)
Psychological GLs:
https://www.mangago.me/read-manga/getting_to_know_grace/
https://www.mangago.me/read-manga/ghosts_of_greywoods/
https://www.mangago.me/read-manga/opium/
https://www.mangago.me/read-manga/i_m_more_dangerous_than_you/
https://www.mangago.me/read-manga/manipulate_my_heart/
https://www.mangago.me/read-manga/fatal_possession/
https://www.mangago.me/read-manga/living_will/
https://www.mangago.me/read-manga/misterioso_1/
https://www.mangago.me/read-manga/strange_tales_of_kisaragi/
https://www.mangago.me/read-manga/tower_of_campanella/
https://www.mangago.me/read-manga/snowhite_s_doorbell/
https://www.mangago.me/read-manga/artificial_temperature_36_7_c/
https://www.mangago.me/read-manga/i_love_amy/
https://www.mangago.me/read-manga/let_s_kill_your_husband/
https://www.mangago.me/read-manga/killing_mr_park/
https://www.mangago.me/read-manga/gunjou/
https://www.mangago.me/read-manga/kitanai_kimi_ga_ichiban_kawaii/ (toxic relationship, features extreme fetishes such as age regression/babyplay, vomit kink, period blood kink, etc.)
https://www.mangago.me/read-manga/even_now_we_re_adults/ (cheating)
https://www.mangago.me/read-manga/yodaka_meguru/ (cheating)
https://www.mangago.me/read-manga/your_fetters/ (toxic relationship)
https://www.mangago.me/read-manga/zenbu_kowashite_jigoku_de_aishite/ (toxic relationship)
https://www.mangago.me/read-manga/my_girlfriend_s_not_here_today/ (cheating)
https://www.mangago.me/read-manga/serenade_keum_kyesoo/ (toxic relationship between the FL and side character)
https://www.mangago.me/read-manga/hone_no_nazuki_made_aisu/ (toxic relationship)
https://www.mangago.me/read-manga/immoral_parody/ (short story;age gap, non(?)/dub-con, toxic relationship)
https://www.mangago.me/read-manga/ubai_ai/ (short story;toxic relationship)
https://www.mangago.me/read-manga/the_nest_of_eternity/ (short story;toxic relationship, age gap, non-con)
https://www.mangago.me/read-manga/a_story_of_a_girl_who_killed_her_best_friend/ (one-shot)
https://www.mangago.me/read-manga/aliens/ (one-shot)
https://www.mangago.me/read-manga/141108/ (one-shot)
https://www.mangago.me/read-manga/you_are_my_angela/ (one-shot)
Toxic GLs:
https://www.mangago.me/read-manga/gunjou/
https://www.mangago.me/read-manga/hone_no_nazuki_made_aisu/
https://www.mangago.me/read-manga/seasons_in_bloom/
https://www.mangago.me/read-manga/the_chain_of_youth/
https://www.mangago.me/read-manga/your_fetters/
https://www.mangago.me/read-manga/zenbu_kowashite_jigoku_de_aishite/
https://www.mangago.me/read-manga/savior/
https://www.mangago.me/read-manga/my_brother_and_i_are_rivals/
https://www.mangago.me/read-manga/on_a_leash/
https://www.mangago.me/read-manga/black_white_sal_jiang/
https://www.mangago.me/read-manga/officer_you_can_no_longer_hide_your_tail/
https://www.mangago.me/read-manga/indulging_a_crazy_beauty/
https://www.mangago.me/read-manga/i_love_amy/
https://www.mangago.me/read-manga/the_barefoot_nina/
https://www.mangago.me/read-manga/our_love_is_disgusting/
https://www.mangago.me/read-manga/kill_me_now/
https://www.mangago.me/read-manga/ubai_ai/
https://www.mangago.me/read-manga/shouwaru_tensai_osananajimi_to_no_shoubu_ni_makete_hatsutaiken_o_zenbu_ubawareru_hanashi/
https://www.mangago.me/read-manga/serenade_keum_kyesoo/ (toxic relationship between FL and prominent side character; age gap, teacher-student relationship)
https://www.mangago.me/read-manga/i_m_more_dangerous_than_you/ (age gap, teacher-student relationship, bullying, violence, kidnapping, confinement)
https://www.mangago.me/read-manga/warikitta_kankei_desukara/ (age gap, teacher-student relationship)
https://www.mangago.me/read-manga/kitanai_kimi_ga_ichiban_kawaii/ (contains graphic depictions of multiple fetishes)
https://www.mangago.me/read-manga/manipulate_my_heart/ (age gap, teacher-student relationship, homophobia, abusive parents, human experimentation)
https://www.mangago.me/read-manga/chirizokonai_no_hiraeth/ (suicide and suicidal ideation)
https://www.mangago.me/read-manga/naraku_no_hanazono/ (incest and child sexual abuse [not between MC and FL], abortion, mild violence)
https://www.mangago.me/read-manga/love_thy_neighbor_2/ (age gap, adultery, religious themes, attempted kidnapping/human trafficking)
https://www.mangago.me/read-manga/the_nest_of_eternity/ (age gap, pseudo-incest [kind of, they're not biologically related iirc], non-con)
https://www.mangago.me/read-manga/immoral_parody/ (age gap, non/dub-con)
https://www.mangago.me/read-manga/outro/ (adultery, abusive parent)
https://www.mangago.me/read-manga/yodaka_meguru/ (adultery)
https://www.mangago.me/read-manga/my_girlfriend_s_not_here_today/ (adultery)
https://www.mangago.me/read-manga/efude_to_kurokinu/ (one-shot; adultery)
Dark GLs:
https://www.mangago.me/read-manga/gunjou/
https://www.mangago.me/read-manga/hone_no_nazuki_made_aisu/
https://www.mangago.me/read-manga/seasons_in_bloom/
https://www.mangago.me/read-manga/the_chain_of_youth/
https://www.mangago.me/read-manga/your_fetters/
https://www.mangago.me/read-manga/zenbu_kowashite_jigoku_de_aishite/
https://www.mangago.me/read-manga/i_m_more_dangerous_than_you/
https://www.mangago.me/read-manga/manipulate_my_heart/
https://www.mangago.me/read-manga/i_love_amy/
https://www.mangago.me/read-manga/kago_no_shoujo_wa_koi_wo_suru/
https://www.mangago.me/read-manga/and_kaede_blooms_gorgeously/
https://www.mangago.me/read-manga/isekai_picnic/
https://www.mangago.me/read-manga/strange_tales_of_kisaragi/
https://www.mangago.me/read-manga/qualia_the_purple/
https://www.mangago.me/read-manga/mietemasu_yo_aizawa_san/
https://www.mangago.me/read-manga/last_summer_vacation/ (cringe translation)
https://www.mangago.me/read-manga/suicide_girl/ (GL subtext only)
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/the_onee_sama_and_the_giant/ (violence, gore, sexual harassment, attempted sexual assault)
https://www.mangago.me/read-manga/naraku_no_hanazono/ (incest and child sexual assault [not between MC and FL], abortion, toxic relationship)
https://www.mangago.me/read-manga/chirizokonai_no_hiraeth/ (suicide and suicidal ideation)
https://www.mangago.me/read-manga/the_brave_do_not_fear_yusha_ha_osorezu/ (violence, gore, sexism, mentions of sexual assault and necrophilia)
https://www.mangago.me/read-manga/shura_no_hakoniwa/ (violence, gore, depiction of disassociated personality disorder)
https://www.mangago.me/read-manga/kitanai_kimi_ga_ichiban_kawaii/ (toxic relationship, features some extreme fetishes such as age regression/babyplay, vomit kink, period blood kink, etc.)
https://www.mangago.me/read-manga/sugar_girl_drip/ (violence, blood and gore, torture, abuse, child abuse, child neglect, sexual harassment and sexual assault [none of these are done by MC and FL])
yuri recs with darker themes pleaseeeeeeee