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this one unfolds in a really interesting way imo! if you like it and want to support the artist it's available on tappytoon :) http://www.mangago.zone/read-manga/someone_else_s_bl_manhwa/?ESTJ
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some hidden gems (idk how popular they are tho so if they are well known, my apologies)
http://www.mangago.zone/read-manga/shimanami_tasogare/
http://www.mangago.zone/read-manga/doukyuusei_nakamura_asumiko/
http://www.mangago.zone/read-manga/akiyama_kun/
http://www.mangago.zone/read-manga/b_s_s_m_blood_sugar_sex_magic/
http://www.mangago.zone/read-manga/toriaezu_kiss_shite_kudasai/
http://www.mangago.zone/read-manga/hatsuai/
http://www.mangago.zone/read-manga/shiro_no_koro/
http://www.mangago.zone/read-manga/mizu_no_haru/
http://www.mangago.zone/read-manga/trap_in_a_skirt/
http://www.mangago.zone/read-manga/kono_ore_ga_omae_nanka_suki_na_wakenai/
http://www.mangago.zone/read-manga/utsukushii_tamashii/
http://www.mangago.zone/read-manga/negative_kun_to_positive_kun/
http://www.mangago.zone/read-manga/cupid_ni_rakurai/
http://www.mangago.zone/read-manga/kimi_wa_natsu_no_naka/
http://www.mangago.zone/read-manga/oboreru_sakana/
http://www.mangago.zone/read-manga/aitsu_no_daihonmei/
http://www.mangago.zone/read-manga/natura_turaly/
http://www.mangago.zone/read-manga/first_thing_i_do_when_i_wake_up/
http://www.mangago.zone/read-manga/j_no_subete/
http://www.mangago.zone/read-manga/mikami_to_sato_wa_mada_yamashikunai/
I hope you enjoy these!
Looking for a good underrated BL highschool manga that has good art and NOT usually on the home page