These are all GLs:
https://www.mangago.zone/read-manga/love_countdown/
https://www.mangago.zone/read-manga/my_princess_charming/
https://www.mangago.zone/read-manga/the_love_doctor/
https://www.mangago.zone/read-manga/senpai_oishii_desu_ka/
https://www.mangago.zone/read-manga/dallaeya/
https://www.mangago.zone/read-manga/exciting_feelings/
https://www.mangago.zone/read-manga/hateful_lady/
https://www.mangago.zone/read-manga/happiness_rides_a_broomstick/
https://www.mangago.zone/read-manga/kamiina_botan_yoeru_sugara_wa_yuri_no_hana/
https://www.mangago.zone/read-manga/blooming_sequence/
https://www.mangago.zone/read-manga/that_senior/
https://www.mangago.zone/read-manga/anything_okay/
https://www.mangago.zone/read-manga/stop_fighting_go_to_bed_athrea_scans/
https://www.mangago.zone/read-manga/hate_me/
https://www.mangago.zone/read-manga/45_seconds/
https://www.mangago.zone/read-manga/the_girlfriend_project/
https://www.mangago.zone/read-manga/yamada_to_kase_san/ (PREQUEL [set in high-school]: https://www.mangago.zone/read-manga/asagao_to_kase_san/)
https://www.mangago.zone/read-manga/my_girlfriend_is_a_gamer/
https://www.mangago.zone/read-manga/that_time_i_was_blackmailed_by_the_class_s_green_tea_bitch/ (season 1 is set in high-school, season 2 onwards is college setting)
https://www.mangago.zone/read-manga/love_gives_me_superpowers/ (first few chapters it's set in high-school, the rest is college setting)
title! It's okay if it's toxic lol