Obey me (but it’s Bl)
These aren't really similar to Killing Stalking, except maybe like 2-3, but here are some psychological GLs you can check out:
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/manipulate_my_heart/
https://www.mangago.me/read-manga/fujiyuu_sekai/
https://www.mangago.me/read-manga/sugar_girl_drip/
https://www.mangago.me/read-manga/apricot_fuzz/
https://www.mangago.me/read-manga/white_angels_have_no_wings/ (SEQUEL: https://www.mangago.me/read-manga/white_angels_have_no_rest/)
https://www.mangago.me/read-manga/zuo_ying_xiao_jie/ (MC has an unhealthy/incestuous(?) relationship with her mum, so I guess it's kind of like KS)
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/the_nest_of_eternity/ (short story;toxic relationship, age gap, non-con)
https://www.mangago.me/read-manga/ubai_ai/ (short story)
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)
Any recommendations on anything like killing stalking but gl if there's none then it could be bl pls