Most manhuas are pretty slow burn like 'Global examination' and 'Little mushroom', 'i ship my rival×me', 'lemon lighting' also some mangas too like 'Cherry magic' , 'Chiguhagu na Kiss'.
BL manhwas with 'Shounen AI' are my to go to reads
https://www.mangago.zone/read-manga/nekama_punch/
https://www.mangago.zone/read-manga/one_take/
https://www.mangago.zone/read-manga/my_darling_signed_in/
https://www.mangago.zone/read-manga/there_s_something_wrong_with_my_popularity/
https://www.mangago.zone/read-manga/when_the_killer_falls_in_love/
https://www.mangago.zone/read-manga/tractor_full_of_love/
https://www.mangago.zone/read-manga/semantic_error/
https://www.mangago.zone/read-manga/hell_high_water/ (this has a novel called S.H.I.E.L.D. Series I think? the comic adaptation was good I was planning to read the novel some time in the future)
https://www.mangago.zone/read-manga/until_morning_light/
I suggest
https://www.mangago.zone/read-manga/cherry_blossoms_after_winter/
https://www.mangago.zone/read-manga/the_last_zombie/ (I don't think this one has any sex but its short. 26 chapters)
I probably have more so I'll check later but def read cherry blossoms after winter. its sad at first but so worth it and cute.
anyone got sum slow burn bl recommendations for me? im tired of sex scenes being few chapters in