help~

1) http://www.mangago.zone/read-manga/oki_ni_mesu_mama/
2) http://www.mangago.zone/read-manga/ayashi_no_kimi_no_koiwazurai/
3) http://www.mangago.zone/read-manga/monster_petite_panic/
4) http://www.mangago.zone/read-manga/shisei_gokumon/

^These are pure fluff. In the 3rd one the uke becomes dark skinned when he transforms. In the 4th the uke becomes dark skinned whenever he touches his lover.

5) http://www.mangago.zone/read-manga/the_hinanomori/
About half of the main characters are dark skinned in this one, but the art style may be off putting depending on your taste. Two (dark skinned) brothers end up together, alongside two other couples.

I'm about to type that too xD

(these are really good with a good rating) http://www.mangago.zone/read-manga/liquor_cigarette/
http://www.mangago.zone/read-manga/shangri_la_no_tori/
http://www.mangago.zone/read-manga/neon_sign_amber/
(these are.... average?)
http://www.mangago.zone/read-manga/baka_ni_koi_toka_shoujiki_muri_ja_ne/
http://www.mangago.zone/read-manga/kesshoku_impulse/
http://www.mangago.zone/read-manga/kawaii_obaka_kun/

http://www.mangago.zone/read-manga/kesshoku_impulse/

These are really great recommendations! Thanks a bunch, guys ヽ(*´∀｀)ノ