Green flags ONLY

https://www.mangago.zone/home/mangalist/3253418/

Spinach Bouquet
Tu Quoque
Haru to Natsu to Nacchan to Aki to Fuyu to Bok
Snow Fairy
Nagahama to Be, or Not to Be
Green Apple Paradise
Give Me a Hug Mr. Frog
Swing Baby
Ashita Ai Kamo Shirenai

I will second Tu Quoque! It’s so good. And I know you asked for manhwa, but this manga is so sweet and so healing that I’m going to recommend it anyway: https://www.mangago.zone/read-manga/senshun_kansoku/

BL:
https://www.mangago.zone/read-manga/love_strongly_surprise/
https://www.mangago.zone/read-manga/show_me_some_love/
https://www.mangago.zone/read-manga/one_reason_why_he_hates_me/
Animals:
https://www.mangago.zone/read-manga/the_tale_of_goldiluck_the_black_kitten/
https://www.mangago.zone/read-manga/ramboo_and_panboo/ (Manhua)
https://www.mangago.zone/read-manga/go_away_let_me_be_cute_first/ (Manhua)
https://www.mangago.zone/read-manga/black_cat_and_soldier/ (Manga)
https://www.mangago.zone/read-manga/i_am_a_small_kitten/ (Manhua)
https://www.mangago.zone/read-manga/hello_griffin_the_fluffy_bird/
GL:
https://www.mangago.zone/read-manga/that_senior/
https://www.mangago.zone/read-manga/lit_a_light/
https://www.mangago.zone/read-manga/love_countdown/
https://www.mangago.zone/read-manga/ring_my_bell/
Straight:
https://www.mangago.zone/read-manga/the_savior_s_book_caf_in_another_world/ (Manga)
https://www.mangago.zone/read-manga/want_to_see_my_cat/
https://www.mangago.zone/read-manga/toumei_otoko_to_ningen_onna_sonouchi_fuufu_ni_naru_futari/ (Manga)

.

I hope you enjoy (≧∀≦)
https://www.mangago.zone/read-manga/leo/
https://www.mangago.zone/read-manga/my_boss_is_a_goddess/
https://www.mangago.zone/read-manga/minority_1/
https://www.mangago.zone/read-manga/boy_to_boy/
https://www.mangago.zone/read-manga/tu_quoque/
https://www.mangago.zone/read-manga/biting_the_tiger/
https://www.mangago.zone/read-manga/fall_for_me_songha/
https://www.mangago.zone/read-manga/dream_away/
https://www.mangago.zone/read-manga/hey_prince/
https://www.mangago.zone/read-manga/serious_joke/
https://www.mangago.zone/read-manga/a_proper_relationship/
https://www.mangago.zone/read-manga/peach_and_her_papas/
https://www.mangago.zone/read-manga/the_fairy_bath_thief/
https://www.mangago.zone/read-manga/double_faced_anchor/
https://www.mangago.zone/read-manga/boys_love_jagal/
https://www.mangago.zone/read-manga/i_have_a_boyfriend/
https://www.mangago.zone/read-manga/link_and_ring/
https://www.mangago.zone/read-manga/family_now_and_forever/
https://www.mangago.zone/read-manga/sekai_de_ichiban_toui_koi/
https://www.mangago.zone/read-manga/haru_to_natsu_to_nacchan_to_aki_to_fuyu_to_boku/
https://www.mangago.zone/read-manga/chameleon_wa_tenohira_ni_koi_wo_suru/
https://www.mangago.zone/read-manga/shinyuu_no_dousei_shite_ni_un_to_iu_made/
https://www.mangago.zone/read-manga/ao_to_midori/
https://www.mangago.zone/read-manga/chiguhagu_na_kiss/
https://www.mangago.zone/read-manga/loss_time_ni_hanamuke_o/
https://www.mangago.zone/read-manga/snow_fairy/
https://www.mangago.zone/read-manga/konosaki_wa_futarikiride/
https://www.mangago.zone/read-manga/old_fashioned_cupcake/
https://www.mangago.zone/read-manga/living_with_him/
https://www.mangago.zone/read-manga/delivery_hug_therapy/
https://www.mangago.zone/read-manga/hidamari_no_orange/
https://www.mangago.zone/read-manga/awairo_emaki/
https://www.mangago.zone/read-manga/kimi_to_nara_koi_wo_shite_mite_mo/
https://www.mangago.zone/read-manga/hayama_sensei_no_dakimakura/
https://www.mangago.zone/read-manga/motoyan_papa_to_hitsuji_sensei_yotsuba/
https://www.mangago.zone/read-manga/ugetsudou_antique/
https://www.mangago.zone/read-manga/itooshiki_hibi/
https://www.mangago.zone/read-manga/toumei_na_ai_no_utsuwa/
https://www.mangago.zone/read-manga/amagami_wo_kimi_ni/
https://www.mangago.zone/read-manga/the_omega_takes_a_husband/
https://www.mangago.zone/read-manga/ookami_sama_no_koiwazurai/
https://www.mangago.zone/read-manga/mitsuya_sensei_no_keikakuteki_na_edzuke/
https://www.mangago.zone/read-manga/shiawase_gohan_maki_to_hanazawa/
https://www.mangago.zone/read-manga/enishi_majiwaru_haguremono/
https://www.mangago.zone/read-manga/muchuu_ni_naruu_yo/
https://www.mangago.zone/read-manga/country_diary/
https://www.mangago.zone/read-manga/tabun_korekara_ai_no_hibi/

Between the stars
Between the stars
Between the stars