Shenhe

Have you tried Subverse? You'll probably find some

https://www.mangago.zone/albumtag/Spanking%20/

the only thing i remember from this manhwa is the doctors beautiful ass cheeks
https://www.mangago.zone/read-manga/mary_jane/
also yeah just try any subverse list i dont have a link but im sure ull find some ╮(￣▽￣)╭

https://www.mangago.zone/read-manga/daily_part_time_job/ https://www.mangago.zone/read-manga/on_or_off/ https://www.mangago.zone/read-manga/exclusive_no_love_zone/ https://www.mangago.zone/read-manga/a_thousand_cranes/

Old seme and young uke?

Then perhaps this one;
https://www.mangago.zone/read-manga/on_or_off/
This is continuing of above; https://www.mangago.zone/read-manga/love_work_balance_jujucat/