https://www.mangago.zone/read-manga/stalker_x_stalker/
https://www.mangago.zone/read-manga/kami_kon_ni_ai/
https://www.mangago.zone/read-manga/yagi_to_ookami_no_hatsujou_jijou/
https://www.mangago.zone/read-manga/alpha_ga_alpha_wo_daku_houhou/
https://www.mangago.zone/read-manga/ibitsu_na_koi_no_seesaw_game/
https://www.mangago.zone/read-manga/my_boyfriend_s_a_ticking_time_bomb/
https://www.mangago.zone/read-manga/nise_x_koi_boyfriend/ (ch 3, ch 11)
https://www.mangago.zone/read-manga/i_m_a_villainess_but_i_became_a_mother/
https://www.mangago.zone/read-manga/perfect_secret_love_the_bad_new_wife_is_a_little_sweet/
https://www.mangago.zone/read-manga/yuusha_sama_ni_ikinari_kyuukonsareta_no_desu_ga/
https://www.mangago.zone/read-manga/the_count_s_daughter_is_forcibly_paired_to_the_elite_knight_she_fights_with_like_cat_and_dog/
https://www.mangago.zone/read-manga/motokare_to_sugosu_ni_haku_san_nichi_goe_aikawarazu_kawaii_na/
Hope some of these are new to you!
Forgot this one too
https://www.mangago.zone/read-manga/miniamaru_kareshi/
recently binge read under the yandere tag and I'm scouting for more.. anyone have any reccs??? even if it's not exactly yandere.. just the possessive and obsessive behavior is so yummy in fiction lol