Straight, GL or BL School Romance

High-school setting GLs:
https://www.mangago.me/read-manga/hana_ni_arashi_kovachi_luka/
https://www.mangago.me/read-manga/hello_melancholic/
https://www.mangago.me/read-manga/hertz_around_you/
https://www.mangago.me/read-manga/sora_haena/
https://www.mangago.me/read-manga/she_is_still_cute_today/
https://www.mangago.me/read-manga/ouji_sama_nante_iranai/
https://www.mangago.me/read-manga/soulmate_yuri/
https://www.mangago.me/read-manga/useless_princesses/
https://www.mangago.me/read-manga/can_t_defy_the_lonely_girl/
https://www.mangago.me/read-manga/eventually_i_will_become_yours/
https://www.mangago.me/read-manga/a_model_advisory/
https://www.mangago.me/read-manga/asagao_to_kase_san/ (SEQUEL: https://www.mangago.me/read-manga/yamada_to_kase_san/)
https://www.mangago.me/read-manga/ikemen_sugidesu_shiki_senpai/
https://www.mangago.me/read-manga/girl_friends/
https://www.mangago.me/read-manga/between_summer_fall/
https://www.mangago.me/read-manga/dokyuusei_no_oshi_sakka_ni_yuri_mousou_ga_bareta_kekka/
https://www.mangago.me/read-manga/hana_to_hoshi/
https://www.mangago.me/read-manga/ano_koro_no_aoi_hoshi/
https://www.mangago.me/read-manga/hana_to_hina_wa_houkago/
https://www.mangago.me/read-manga/futaribeya/
https://www.mangago.me/read-manga/odoriba_ni_sukaato_ga_naru/
https://www.mangago.me/read-manga/koi_yori_aoku_oneshot/
https://www.mangago.me/read-manga/the_moon_on_a_rainy_night/
https://www.mangago.me/read-manga/pink_ribbon/
https://www.mangago.me/read-manga/shoujo_manga_protagonist_x_rival_san/
https://www.mangago.me/read-manga/our_yuri_started_with_me_getting_rejected_in_a_dream/
https://www.mangago.me/read-manga/how_do_i_get_together_with_my_childhood_friend/
https://www.mangago.me/read-manga/love_allergy_syndrome/
https://www.mangago.me/read-manga/shy_na_ano_ko_ni_natsukaretai/
https://www.mangago.me/read-manga/kimi_ga_hoeru_tame_no_uta_wo/
https://www.mangago.me/read-manga/yearning_for_a_night_full_of_you/
https://www.mangago.me/read-manga/yume_to_koi_dewa_tsuriawanai/
https://www.mangago.me/read-manga/kimi_no_tame_no_curtain_call/
https://www.mangago.me/read-manga/spring_a_minuet/ (one-shot)

College setting GLs:
https://www.mangago.me/read-manga/love_countdown/
https://www.mangago.me/read-manga/my_princess_charming/
https://www.mangago.me/read-manga/the_love_doctor/
https://www.mangago.me/read-manga/senpai_oishii_desu_ka/
https://www.mangago.me/read-manga/dallaeya/
https://www.mangago.me/read-manga/exciting_feelings/
https://www.mangago.me/read-manga/happiness_rides_a_broomstick/
https://www.mangago.me/read-manga/kamiina_botan_yoeru_sugara_wa_yuri_no_hana/
https://www.mangago.me/read-manga/anything_okay/
https://www.mangago.me/read-manga/hate_me/
https://www.mangago.me/read-manga/45_seconds/
https://www.mangago.me/read-manga/the_girlfriend_project/
https://www.mangago.me/read-manga/yamada_to_kase_san/ (PREQUEL: https://www.mangago.me/read-manga/asagao_to_kase_san/)
https://www.mangago.me/read-manga/my_girlfriend_is_a_gamer/

High-school and college setting GLs:
https://www.mangago.me/read-manga/that_time_i_was_blackmailed_by_the_class_s_green_tea_bitch/
https://www.mangago.me/read-manga/love_gives_me_superpowers/

https://www.mangago.me/read-manga/takamori_kun_wo_damarasetai/

https://www.mangago.me/read-manga/kono_oto_tomare/

https://www.mangago.me/read-manga/fluffy_punk_nakamura_kun/

https://www.mangago.me/read-manga/nemuro_kun_wa_kao_ga_ii/

https://www.mangago.me/read-manga/hello_innocent/

https://www.mangago.me/read-manga/otonari_kun_wa_kyou_mo_watashi_wo_komaraseru/

https://www.mangago.me/read-manga/keeping_you_in_sight/

https://www.mangago.me/read-manga/don_t_spoil_me_maid_kun/

https://www.mangago.me/read-manga/amano_kun_to_koi_nanka_shinai/

https://www.mangago.me/read-manga/shiokaze_to_ryuu_no_sumika/

https://www.mangago.me/read-manga/the_feline_neighbor_and_the_unversed_love/

https://www.mangago.me/read-manga/oh_dangun/

https://www.mangago.me/read-manga/koisuru_tenshi_wa_tsumibukai/

https://www.mangago.me/read-manga/yamada_s_class_diary/

https://www.mangago.me/read-manga/let_s_keep_this_love_a_secret_from_everyone/

https://www.mangago.me/read-manga/i_just_want_to_mooch_off_your_luck/

https://www.mangago.me/read-manga/kurogane_kun_to_saikyou_no_koi/

https://www.mangago.me/read-manga/kuroko_to_akuyaku_kun/

https://www.mangago.me/read-manga/relax_and_fall_in_love_with_dignity/

https://www.mangago.me/read-manga/hoteri_hotette_first_kiss/

https://www.mangago.me/read-manga/koi_no_iroha_wo_oshiete/

https://www.mangago.me/read-manga/hajimete_koibito_ga_dekimashita/

https://www.mangago.me/read-manga/miki_san_sukidesu/

https://www.mangago.me/read-manga/nui_ni_koishite_ii_desu_ka/ https://www.mangago.me/read-manga/hamuko_to_gao_kun/

https://www.mangago.me/read-manga/when_you_re_targeted_by_the_bully/

https://www.mangago.me/read-manga/ima_koi_wo_shite_imasu/

https://www.mangago.me/read-manga/yamase_wa_doko_e_itta/

https://www.mangago.me/read-manga/natsume_to_natsume/

School Life Pt 1
https://www.mangago.me/home/mangalist/1408350/
School Life Pt 2
https://www.mangago.me/home/mangalist/1759860/

Here you go dear, these are all SL, hope it helps and you enjoy