Any stories where the characters actually have some melanin? Don't think I've ever read a ...

Try out Taming the Tiger from BWAT! or The worst guy in the Universe:)

Female side character who becomes important to the plot, shows up at chapter 20:

https://www.mangago.zone/read-manga/sherbet_above_the_sea_of_fog/ (GL)

Here are some tan babes for you

https://www.mangago.zone/read-manga/sleep_or_sex/

https://www.mangago.zone/read-manga/home_ep/

https://www.mangago.zone/read-manga/shinsujeon/

https://www.mangago.zone/read-manga/plum_love/

https://www.mangago.zone/read-manga/love_sick_dog/

https://www.mangago.zone/read-manga/mother_s_spirit/

https://www.mangago.zone/read-manga/tractor_full_of_love/

https://www.mangago.zone/read-manga/rivalry_1/

https://www.mangago.zone/read-manga/the_devil_s_temptation/

https://www.mangago.zone/read-manga/anemone_theater/

https://www.mangago.zone/read-manga/my_purrfect_boss/

https://www.mangago.zone/read-manga/playtime_with_hakdo/

https://www.mangago.zone/read-manga/diego/

https://www.mangago.zone/read-manga/cozy_obsession/

https://www.mangago.zone/read-manga/dirty_high/

The couple are white, but there are a lot of people of colour in this one
https://www.mangago.zone/read-manga/nerd_project/

https://www.mangago.zone/read-manga/mary_jane/

https://www.mangago.zone/read-manga/wind_beneath_my_wings_official/

I had to mention this one, just because of the gorgeous black diva that has appeared in the latest few chapters, she's a side character though
https://www.mangago.zone/read-manga/honey_bear/

https://www.mangago.zone/read-manga/our_sunny_days/

And also, you can try all of the BWAT stories

Tysm guys!

Girlll this one is one of my faves

https://www.mangago.zone/read-manga/raion_gotoki_no_kuni_kara/uu/nhs_v-1-chapter-726117/pg-1/

https://www.mangago.zone/read-manga/i_used_to_be_a_boss/ MC HAS DARKISH SKIN AND IS SO FUNNY

https://www.mangago.zone/read-manga/gachiakuta/ has ACTUAL blsck MCs w culturally black hairstyles

only ones i can think off top of my bead