https://www.mangago.zone/read-manga/the_male_leads_trapped_in_my_house/ THIS>>>> (zombie apocalypse) (the novel is even better in terms of survival horror atmosphere)
https://www.mangago.zone/read-manga/i_stole_the_number_one_ranker_s_soul/ (hunters/dungeons)
https://www.mangago.zone/read-manga/it_s_my_destiny_to_be_the_hero_s_saviour/ (hunters/dungeons in rofan setting)
https://www.mangago.zone/read-manga/philia_rose_the_prophecy_of_the_crown_of_thorns/ (adventure/fantasy)
https://www.mangago.zone/read-manga/i_m_a_martial_art_villainess_but_i_m_the_strongest/ (martial arts)
https://www.mangago.zone/read-manga/the_returned_c_rank_tank_won_t_die_quantum_scans/ (hunters/dungeons) (this one had no explicit romance in the novel, don't know about the adaptation because they changed it a bit)
https://www.mangago.zone/read-manga/a_ranker_s_guide_to_the_good_life/ (hunters/dungeons)
https://www.mangago.zone/read-manga/dear_fairy_please_contract_with_me/ (hunters/dungeons in rofan setting)
They're all manhwas though, sorry about that :/
https://www.mangago.zone/read-manga/monster_tribe/
https://www.mangago.zone/read-manga/the_kagari_monster_family/
https://www.mangago.zone/read-manga/k_9_keishichou_kouanbu_kouan_dai_9_ka_inou_taisaku_gakari/
https://www.mangago.zone/read-manga/nengara_nembakuan_sassenka/
https://www.mangago.zone/read-manga/koroshiya_no_oshi/
https://www.mangago.zone/read-manga/onimotsu_to_yobareta_tensei_hime_wa_shoukan_yuusha_ni_koi_wo_shite_seijo_ni_narimashita/
https://www.mangago.zone/read-manga/when_the_ghost_bird_chirps/
https://www.mangago.zone/read-manga/the_witch_and_the_mercenary/
https://www.mangago.zone/read-manga/tenisaki_wa_kusushi_ga_sukunai_sekaideshita/
https://www.mangago.zone/read-manga/oh_dangun/
https://www.mangago.zone/read-manga/isekai_de_ane_ni_namae_wo_ubawaremashita/
https://www.mangago.zone/read-manga/phoenix_queen/
https://www.mangago.zone/read-manga/kamisama_gakuen_armeria/

something that combines a fuck ton of action almost like a shounen while still having the essence of shojosei (hot male lead(s) & romance)? manga format is preferable, but anything else is fine