The most underrated hidden gem that I know that I'll share with you is the BEST new-gen DARK FANTASY, ACTION SHOUNEN MANGA of the 2020s, the peak of human literature, Kagurabachi! If you're looking for a story with a more slow-burning pacing and world-building, but masterfully-written plot, realistically written and interesting characters with great designs, GORGEOUS ART that evolves with each new chapter, MOVIE-LIKE fighting choreography, BEAUTIFUL panelling and composition and NO ROMANCE, ZERO FANSERVICE AND ABSOLUTELY NO SEXUALISATION, ESPECIALLY OF IT'S FEMALE CAST!! OH ALSO IMPORTANT MENTION; DON'T DROP THIS AT CHAPTER 58 (IYKYK), TRUST THE PROCESS OF HOKAZONO-SENSEI'S GENIUS!! GO READ IT NOW!!!
https://www.mangago.me/read-manga/kagurabachi/ (PEAK FICTION)
Shounen/seinen (mostly action) mangas:
https://www.mangago.me/read-manga/gokurakugai/
https://www.mangago.me/read-manga/windbreaker/
https://www.mangago.me/read-manga/tokyo_aliens/
https://www.mangago.me/read-manga/gachiakuta/
https://www.mangago.me/read-manga/galaxias/
https://www.mangago.me/read-manga/ghost_fixers/
https://www.mangago.me/read-manga/centuria/
https://www.mangago.me/read-manga/psycho_eyes/
https://www.mangago.me/read-manga/witchriv/
https://www.mangago.me/read-manga/chainsaw_man/
https://www.mangago.me/read-manga/ultimate_exorcist_kiyoshi/
https://www.mangago.me/read-manga/madan_no_ichi/
https://www.mangago.me/read-manga/tongari_boushi_no_atelier/
https://www.mangago.me/read-manga/magical_girl_and_narco_wars/
https://www.mangago.me/read-manga/the_marshal_king/
https://www.mangago.me/read-manga/kai_hen_wizards/
https://www.mangago.me/read-manga/ruby_on_the_cake_hitogui_majo_no_bansankai/
Not sure if you read GLs, but just in case here are a few:
Completed (Fluff):
https://www.mangago.me/read-manga/the_flower_princess_of_sylph/
https://www.mangago.me/read-manga/blooming_sequence/
https://www.mangago.me/read-manga/pink_ribbon/
https://www.mangago.me/read-manga/half/
https://www.mangago.me/read-manga/exciting_feelings/
https://www.mangago.me/read-manga/maison_de_maid/
https://www.mangago.me/read-manga/the_love_doctor/
https://www.mangago.me/read-manga/girl_friends/
https://www.mangago.me/read-manga/mage_demon_queen/
https://www.mangago.me/read-manga/useless_princesses/
https://www.mangago.me/read-manga/hana_to_hoshi/
https://www.mangago.me/read-manga/yume_to_koi_dewa_tsuriawanai/
https://www.mangago.me/read-manga/bocchi_kaibutsu_to_moumoku_shoujo/
https://www.mangago.me/read-manga/so_do_you_wanna_go_out_or/
https://www.mangago.me/read-manga/hello_melancholic/
https://www.mangago.me/read-manga/teiji_ni_agaretara/
https://www.mangago.me/read-manga/today_we_continue_our_lives_together_under_the_same_roof/
https://www.mangago.me/read-manga/sheep_princess_in_wolf_s_clothing/
https://www.mangago.me/read-manga/crescent_moon_and_doughnuts/
https://www.mangago.me/read-manga/kimi_ni_tsumugu_bouhaku/
https://www.mangago.me/read-manga/aoi_hana/
https://www.mangago.me/read-manga/the_daughter_of_evil_and_miss_devil/
https://www.mangago.me/read-manga/eventually_i_will_become_yours/
https://www.mangago.me/read-manga/tsukuritai_onna_to_tabetai_onna/
https://www.mangago.me/read-manga/still_sick/
https://www.mangago.me/read-manga/handsome_girl_and_sheltered_girl/
https://www.mangago.me/read-manga/bead_master/
https://www.mangago.me/read-manga/ikemen_sugidesu_shiki_senpai/
https://www.mangago.me/read-manga/dallaeya/
https://www.mangago.me/read-manga/shoujo_manga_protagonist_x_rival_san/
https://www.mangago.me/read-manga/hertz_around_you/
https://www.mangago.me/read-manga/hana_ni_arashi_kovachi_luka/
https://www.mangago.me/read-manga/how_do_i_get_together_with_my_childhood_friend/
https://www.mangago.me/read-manga/her_mountain_her_ocean/
https://www.mangago.me/read-manga/clandestine_affair/
https://www.mangago.me/read-manga/gal_maid_villainess_only_milady_s_happy_end_will_win/
https://www.mangago.me/read-manga/akazukin_ni_taberareta_oukami/
https://www.mangago.me/read-manga/bai_lijin_among_mortals/
https://www.mangago.me/read-manga/the_noble_lady_on_the_edge_of_the_cliff_wants_to_make_the_dark_knight_fall_in_love/
https://www.mangago.me/read-manga/odoriba_ni_sukaato_ga_naru/
https://www.mangago.me/read-manga/ryuu_to_ryuu_no_kekkon/
https://www.mangago.me/read-manga/shy_na_ano_ko_ni_natsukaretai/
https://www.mangago.me/read-manga/sherbet_above_the_sea_of_fog/
https://www.mangago.me/read-manga/koushin_koinu_ni_koibumi_wo/
https://www.mangago.me/read-manga/cheerful_amnesia/
On-going (Fluff):
https://www.mangago.me/read-manga/toward_the_blue_athrea_scans/
https://www.mangago.me/read-manga/the_moon_on_a_rainy_night/
https://www.mangago.me/read-manga/yuzu_and_rika/
https://www.mangago.me/read-manga/the_magical_revolution_of_the_reincarnated_princess_and_the_genius_young_lady/
https://www.mangago.me/read-manga/gal_loving_jk_wants_to_be_a_gal/
https://www.mangago.me/read-manga/yuri_yuri_panic/
https://www.mangago.me/read-manga/makoto_senpai_no_mae_de_wa_kakko_tsukerarenai/
https://www.mangago.me/read-manga/fox_and_elixir_athrea_scans/
https://www.mangago.me/read-manga/can_i_call_you_unnie/
https://www.mangago.me/read-manga/i_favor_the_villainess/
https://www.mangago.me/read-manga/watashi_to_kanojo_no_kawaii_koi_no_hajime_kata/
https://www.mangago.me/read-manga/32_cm_height_difference/
https://www.mangago.me/read-manga/the_moon_does_not_count_sheep/
https://www.mangago.me/read-manga/kamiina_botan_yoeru_sugara_wa_yuri_no_hana/
https://www.mangago.me/read-manga/shinyuu_ni_sukina_hito_ga_dekitarashii/
https://www.mangago.me/read-manga/big_love_from_ultra_deep_space/
https://www.mangago.me/read-manga/hanamonogatari/
https://www.mangago.me/read-manga/yearning_for_a_night_full_of_you/
https://www.mangago.me/read-manga/the_heart_of_the_thorns/
https://www.mangago.me/read-manga/tsumugi_chan_wants_to_make_seto_san_laugh/
https://www.mangago.me/read-manga/furetai_wa_koi_no_hajimari/
https://www.mangago.me/read-manga/kimi_ga_hoeru_tame_no_uta_wo/
https://www.mangago.me/read-manga/the_subjugation_school_life_of_the_corpse_girl_and_the_love_heavy_knight/
https://www.mangago.me/read-manga/girlfriend_limited_to_7_days/
https://www.mangago.me/read-manga/oni_ure_idol_ga_kyou_mo_watashi_wo_oshitekuru/
https://www.mangago.me/read-manga/foxes_always_lie/
https://www.mangago.me/read-manga/adachi_to_shimamura/
https://www.mangago.me/read-manga/koharu_to_minato_watashi_no_partner_wa_onna_no_ko/
https://www.mangago.me/read-manga/mietemasu_yo_aizawa_san/
https://www.mangago.me/read-manga/love_gives_me_superpowers/
https://www.mangago.me/read-manga/my_ex_girlfriend_became_my_boss/
https://www.mangago.me/read-manga/unnie_i_like_you/
https://www.mangago.me/read-manga/wicked_spot/
https://www.mangago.me/read-manga/akumade_amai_watashi_no_kanojo/
https://www.mangago.me/read-manga/tsumetakute_yawaraka/
https://www.mangago.me/read-manga/genjitsu_sekai_real_demo_shiawase_ni_shite_kudasai_ne/
https://www.mangago.me/read-manga/koi_yori_aoku_oneshot/
https://www.mangago.me/read-manga/ano_koro_no_aoi_hoshi/
https://www.mangago.me/read-manga/listening_to_the_stars_bbl_scans/
https://www.mangago.me/read-manga/muryoku_seijo_to_munou_oujo/
https://www.mangago.me/read-manga/kiraware_majo_reijou_to_dansou_ouji_no_kon_yaku/
https://www.mangago.me/read-manga/the_song_that_transcends_this_world/
https://www.mangago.me/read-manga/anata_mitai_ni/
https://www.mangago.me/read-manga/ano_ko_to_futari_de/
Completed (Angst):
https://www.mangago.me/read-manga/long_awaited_feelings/
https://www.mangago.me/read-manga/sayonara_rose_garden/
https://www.mangago.me/read-manga/a_joyful_life/
https://www.mangago.me/read-manga/run_away_with_me_girl/
https://www.mangago.me/read-manga/to_die_in_june_one/ (read the last two chapters here: https://www.mangago.me/read-manga/to_die_in_june/)
https://www.mangago.me/read-manga/oniisama_e/
https://www.mangago.me/read-manga/living_will/
https://www.mangago.me/read-manga/seasons_in_bloom/
https://www.mangago.me/read-manga/kago_no_shoujo_wa_koi_wo_suru/
https://www.mangago.me/read-manga/huijin_huayuan/
https://www.mangago.me/read-manga/vampire_chan_junior_chan/
https://www.mangago.me/read-manga/yume_no_hashibashi/
https://www.mangago.me/read-manga/composing_spring_in_this_room_where_cherry_blossoms_bloom/
https://www.mangago.me/read-manga/kimi_to_tsuzuru_utakata/
https://www.mangago.me/read-manga/haru_and_midori/
https://www.mangago.me/read-manga/ohana_holoholo/
https://www.mangago.me/read-manga/throw_away_the_suit_together/
https://www.mangago.me/read-manga/getting_to_know_grace/
https://www.mangago.me/read-manga/i_love_amy/
https://www.mangago.me/read-manga/the_sound_of_a_butterfly/
https://www.mangago.me/read-manga/the_wind_spell/
https://www.mangago.me/read-manga/dark_mermaid/ (bullying, harassment, blackmail, sexual assault [none of these happen between MC and FL])
https://www.mangago.me/read-manga/this_love_that_won_t_reach/ (age gap, MC is in love with her sister-in-law;rushed and ambiguous ending)
https://www.mangago.me/read-manga/the_story_of_a_person_who_grew_a_flower/ (short story;age gap, teacher-student relationship;hanahaki disease)
https://www.mangago.me/read-manga/final_film/ (short story)
https://www.mangago.me/read-manga/shiroi_heya_no_futari/ (one-shot)
https://www.mangago.me/read-manga/saudade_ni_kuchidzukete/ (one-shot)
https://www.mangago.me/read-manga/141108/ (one-shot)
https://www.mangago.me/read-manga/aliens/ (one-shot)
https://www.mangago.me/read-manga/the_story_of_the_princess_and_the_little_mermaid/ (one-shot)
On-going (Angst):
https://www.mangago.me/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/
https://www.mangago.me/read-manga/tower_of_campanella/
https://www.mangago.me/read-manga/kimi_ga_shinu_made_koi_wo_shitai/
https://www.mangago.me/read-manga/a_monster_wants_to_eat_me/
https://www.mangago.me/read-manga/artificial_temperature_36_7_c/
https://www.mangago.me/read-manga/have_a_great_trip_after_the_credits_roll/
https://www.mangago.me/read-manga/the_montfort_royal_family_s_scandal_athrea_scans/
Completed (Smut):
https://www.mangago.me/read-manga/sadistic_beauty_side_story/
https://www.mangago.me/read-manga/moonlight_garden_kang_unnie/
https://www.mangago.me/read-manga/opium/
https://www.mangago.me/read-manga/kill_switch/
https://www.mangago.me/read-manga/pulse_ratana_satis/
https://www.mangago.me/read-manga/just_right_there/
https://www.mangago.me/read-manga/hateful_lady/
https://www.mangago.me/read-manga/bad_thinking_diary/
https://www.mangago.me/read-manga/fly_like_a_butterfly_sting_like_a_bee/
https://www.mangago.me/read-manga/the_playgirl_and_the_prince/
https://www.mangago.me/read-manga/the_neighbors_temptation/
https://www.mangago.me/read-manga/goodnight_cinderella/
https://www.mangago.me/read-manga/nakayoshi_onna_boukensha_wa_yoru_ni_naru_to_yadoya_de_mechakucha_ecchi_suru/
https://www.mangago.me/read-manga/club_katoto_chan/
https://www.mangago.me/read-manga/eat_u_up/
https://www.mangago.me/read-manga/pet_s_aesthetics/
https://www.mangago.me/read-manga/office_sweet_365/
https://www.mangago.me/read-manga/love_does_not_fade/
https://www.mangago.me/read-manga/umi_to_anata_to_taiyou_to/
https://www.mangago.me/read-manga/kill_me_now/
https://www.mangago.me/read-manga/the_wolf_steals_the_sun_athrea_scans/ (dub-con)
https://www.mangago.me/read-manga/are_you_only_going_to_study/ (age gap)
https://www.mangago.me/read-manga/talk_dirty_to_me/ (BDSM)
https://www.mangago.me/read-manga/program_me/ (BDSM)
https://www.mangago.me/read-manga/suimitsutou_ha_shoujo_ni_kajirareru/ (attempted gangrape on a side character)
https://www.mangago.me/read-manga/addictive_bing_zi/ (BDSM)
https://www.mangago.me/read-manga/to_my_neighbor_angel/ (in all chapters except the last two the FL has a dick)
https://www.mangago.me/read-manga/for_garbage/ (adultery)
https://www.mangago.me/read-manga/marie_and_alex/ (BDSM)
https://www.mangago.me/read-manga/damp_ascension/ (one-shot;dub-con)
https://www.mangago.me/read-manga/hottie_s_heel_uncensored/ (one-shot;BDSM)
https://www.mangago.me/read-manga/yurika_to_kawakanai_shiitsu_midare_yuri/ (one-shot)
https://www.mangago.me/read-manga/on_the_promised_night/ (one-shot)
https://www.mangago.me/read-manga/hidden_meaning/ (one-shot)
https://www.mangago.me/read-manga/ojou_sama_to_maid_san_ga_yuri_yuri_suru_manga/ (one-shot)
https://www.mangago.me/read-manga/the_soaking_wet_unnie_next_door_wants_me_to_touch_her_down_there/ (one-shot)
https://www.mangago.me/read-manga/aki_chan_is_thinking/ (one-shot)
https://www.mangago.me/read-manga/desire_in_the_dark/ (one-shot)
On-going (Smut):
https://www.mangago.me/read-manga/asumi_chan_is_interested_in_lesbian_brothels/
https://www.mangago.me/read-manga/does_it_count_if_your_first_time_is_with_an_android/
https://www.mangago.me/read-manga/drunken_my_boss/
https://www.mangago.me/read-manga/love_only_the_body/
https://www.mangago.me/read-manga/trash_flower/
https://www.mangago.me/read-manga/please_pick_my_love_too/
https://www.mangago.me/read-manga/murmur_temple_scan/ (dub-con)
https://www.mangago.me/read-manga/beast_of_blue_obsidian/ (blood and gore, violence, slavery, human trafficking, sexual assault, child sexual assault, torture, master-servant relationship, noble-slave relationship, dub-con)
https://www.mangago.me/read-manga/only_to_you/ (BDSM)
If you want to check, I obsessively catalogue everything I read into lists. You can just look at the more general lists like ML, FL or BL (they're at the end of all my lists) or the lists for less specific genres/tropes like "Hunters" "Murim" "Historical BL" "Smut with FL" "Love triangles" and such (I say this because most of my lists are TOO specific lmao)
Since we aren't getting our stories back im on the hunt for the “want to read” stories I lost as well as some things ive had on “reading”. I had a lot of stories with beautiful art and beautiful covers. Stories with very original plots. I had manga and manwhas then on a rare occasion, manhuas (with VERY pretty art. Im super picky with manhua cause I dont rly like the common art style). I also had some underrated ones so if you feel that u have underrated stories lmk! If you had all your stories saved to lists from years back pls lmk as well so I can check it out! I ask this because I most likely wont come across older complete stories so im more likely to find it on somebody's list. Not limited to complete stories btw. Genres consist of romance, josei, drama, action, comedy, shounen, shoujo, and mature. Ill look at literally anything though even if its not those genres. Pls help me on my mission