Some of these don't have smut so not sure if the possessive one is a top or a bottom, but try these:
https://www.mangago.me/read-manga/adachi_to_shimamura/
https://www.mangago.me/read-manga/the_barefoot_nina/
https://www.mangago.me/read-manga/i_love_amy/
https://www.mangago.me/read-manga/savior/
https://www.mangago.me/read-manga/useless_princesses/
https://www.mangago.me/read-manga/tatoe_sekai_ga_owattemo_watashi_wa_kanojo_wo_erabanai/
https://www.mangago.me/read-manga/oni_ure_idol_ga_kyou_mo_watashi_wo_oshitekuru/
https://www.mangago.me/read-manga/shoujo_manga_protagonist_x_rival_san/
https://www.mangago.me/read-manga/after_school_love_affairs/
https://www.mangago.me/read-manga/indulging_a_crazy_beauty/
https://www.mangago.me/read-manga/hone_no_nazuki_made_aisu/
https://www.mangago.me/read-manga/your_fetters/
https://www.mangago.me/read-manga/seasons_in_bloom/
https://www.mangago.me/read-manga/monomania/
https://www.mangago.me/read-manga/her_lies/
https://www.mangago.me/read-manga/saeism/
https://www.mangago.me/read-manga/chasing_lilies/
https://www.mangago.me/read-manga/i_m_a_childhood_friend_and_i_want_to_remain_a_supporting_character_but_for_some_reason_i_became_the_heroine_s_love_interest/
https://www.mangago.me/read-manga/kill_me_now/
https://www.mangago.me/read-manga/we_never_even_broke_up/
https://www.mangago.me/read-manga/the_chain_of_youth/
https://www.mangago.me/read-manga/officer_you_can_no_longer_hide_your_tail/
https://www.mangago.me/read-manga/on_a_leash/
https://www.mangago.me/read-manga/serenade_keum_kyesoo/ (possessive psycho side character)
https://www.mangago.me/read-manga/best_friends/ (omegaverse)
https://www.mangago.me/read-manga/love_thy_neighbor_2/ (age gap, adultery, religious themes and imagery, attempted kidnapping and human trafficking [not between MC and FL])
https://www.mangago.me/read-manga/the_nest_of_eternity/ (short story;age gap, pseudo-incest, non-con)
https://www.mangago.me/read-manga/outro/ (short story; cheating, domestic violence)
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/i_m_more_dangerous_than_you/ (age gap, teacher-student relationship but both leads are 18+, bullying and harassment, kidnapping and confinement, domestic violence)
https://www.mangago.me/read-manga/manipulate_my_heart/ (age gap, teacher-student relationship but both leads are 18+, bullying and harassment, kidnapping and confinement, homophobia, human experimentation)
https://www.mangago.me/read-manga/you_are_my_angela/ (short story)
https://www.mangago.me/read-manga/ubai_ai/ (short story)
youre a lifesaver thank uuu
Heyy looking for yuri with possessive top pls