Sorry, I don't really keep a list of One Shot stories, let alone care enough to keep track of them.
Best you can do is to search for their titles or find them by chance in the Featured Manga at the front page of this website or when you reach the last chapter of any manga.
Shounen ai
https://www.mangago.me/read-manga/hige_to_suzu_to_shabondama/
https://www.mangago.me/read-manga/ashita_wa_kitto_tomodachi_janai_yone/
https://www.mangago.me/read-manga/there_is_no_way_a_pretty_virtual_girl_is_a_girl/
https://www.mangago.me/read-manga/koi_wa_kitsune_mouyou/
https://www.mangago.me/read-manga/itadakimasu_wa_koi_no_aji/
https://www.mangago.me/read-manga/sugar_in_my_coffee/
Yaoi
https://www.mangago.me/read-manga/sakura_kun_s_first_love_blooms_in_a_summer_hue/
Here you go darling! Be sure to click on the blue + to see everything, hope you enjoy!
I have my list if ur interested
https://www.mangago.me/home/mangalist/3302183/
Try "the golden days"
PLS