They are mostly manga only a few manhwas
https://www.mangago.zone/read-manga/saiyaku_wa_boku_o_suki_sugiru/
https://www.mangago.zone/read-manga/sankaku_mado_no_sotogawa_wa_yoru/
https://www.mangago.zone/read-manga/harenochi_shikibu/
https://www.mangago.zone/read-manga/iki_dekinai_no_wa_kimi_no_sei/
https://www.mangago.zone/read-manga/hiyoko_to_yoru_to_yuenchi/
https://www.mangago.zone/read-manga/kawa_ni_sazanami/
https://www.mangago.zone/read-manga/tonari_no_ren_kun_wa_chotto_kowai/
https://www.mangago.zone/read-manga/minato_shoji_koinrandori/
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/country_diary/
https://www.mangago.zone/read-manga/haru_to_natsu_to_nacchan_to_aki_to_fuyu_to_boku/
https://www.mangago.zone/read-manga/koibito_ga_ubu_sugite_komaru/
https://www.mangago.zone/read-manga/inoue_kun_hajimemasen_ka/
https://www.mangago.zone/read-manga/one_week_family/
https://www.mangago.zone/read-manga/yuutousei_wa_unmei_no_akai_ito_ni_sakaraitai/
https://www.mangago.zone/read-manga/delivery_hug_therapy/
https://www.mangago.zone/read-manga/kimini_furu_kotonoha_ha/
https://www.mangago.zone/read-manga/internet_love/
https://www.mangago.zone/read-manga/the_boy_and_the_wolf/
https://www.mangago.zone/read-manga/senshun_kansoku/
https://www.mangago.zone/read-manga/fudanshi_kazoku/
https://www.mangago.zone/read-manga/lionhearts/
https://www.mangago.zone/read-manga/hime_muko/
https://www.mangago.zone/read-manga/sugar_glazed_darling/
https://www.mangago.zone/read-manga/boy_to_boy/
https://www.mangago.zone/read-manga/tu_quoque/
https://www.mangago.zone/read-manga/the_fairy_bath_thief/
https://www.mangago.zone/read-manga/cultivator_x_contract_spirit/
https://www.mangago.zone/read-manga/two_way_trial_youth/
https://www.mangago.zone/read-manga/the_best_smell/
https://www.mangago.zone/read-manga/one_small_step/
https://www.mangago.zone/read-manga/kisses_x_kiss_x_kisses/
https://www.mangago.zone/read-manga/a_season_of_dusk/
https://www.mangago.zone/read-manga/involuntary_romance/
https://www.mangago.zone/read-manga/necromancer_survival/
omfg i love you
can someone recommend me slow burn yaois or shounen ais preferably japanese manga ty ty ty