Check works from Sonoo Michiru, Naono Borha, Basso. You probably read Ueda Aki's Koi ga Ochitara.
On or off
Dangerous Convenience Store
(〜￣△￣)〜
Some age difference, but maybe not as much as u want. Still funny and good read… Punch up love.
https://www.mangago.me/read-manga/punch_up/
Long Time Red Mall!
This is also a list that I follow: https://www.mangago.me/home/mangalist/298732/
Love For Sale
(sorta)
yaoi with age difference ? like hot older guy with wrinkles and eyebags + younger guy without wrinkles and eyebags