Specifically yaoi
Kinda soft an 3ch but my fav https://www.mangago.zone/read-manga/make_a_pet_out_of_a_cactus/
Healthy or toxic your grace
Either will do
I might have more in this list
https://www.mangago.zone/home/mangalist/2614542/?filter=&page=1
These are all one shots and some have multiple oneshot chapters.
https://www.mangago.zone/read-manga/attack_on_titan_dj_secret/ - AOT ships aren't my thing but this one is special
https://www.mangago.zone/read-manga/henai_maotoko_hen/
https://www.mangago.zone/read-manga/souyuu_ganbou_no_hanashi/
https://www.mangago.zone/read-manga/test_play/
https://www.mangago.zone/read-manga/henai/
https://www.mangago.zone/read-manga/shasei_kanri_dou_deshou/
https://www.mangago.zone/read-manga/henai_fumouhen/
https://www.mangago.zone/read-manga/i_am_your_pavlov_dog/
Can YALL recommend me some good S&M one-shots