Koi ga ochitara
I love love this, wish I could read it for the first time again
Saenai Oji-san to Ore-sama Yankee-kun
Ureoji BL
Midnight Rain (CTK) (Yaoi)
Don't Call Me Daddy, The Honest Life of a Game Studio, Oni to Tengoku Kyuu, VR Ojisan no Hatsukoi also fits the bill, but it may/may not be your forte.
Here you go enjoy https://www.mangago.zone/home/mangalist/2543440/
OLD MEN YAOI PLS （/TДT)/