Any manhwa like semantic error?? Slow paced and super cute but also sexy at times

Ummm idk if it's what you're looking for, but "perfect buddy" seems to be to your liking

The uke is a mega introvert who is growing to know his emotions and lears to open up slowly, seme is an adorable golden retriever, the smut is good and art style is slightly different from other manhwas
If you're into office romances you should give it a go

-Nerd Project

Try these!
https://www.mangago.me/read-manga/nerd_project/

https://www.mangago.me/read-manga/the_story_about_you_x_me/

https://www.mangago.me/read-manga/untouchable/

https://www.mangago.me/read-manga/mr_100_perfect/

https://www.mangago.me/read-manga/oh_my_assistant/

https://www.mangago.me/read-manga/the_professor_s_double_life/

https://www.mangago.me/read-manga/the_good_teacher/

https://www.mangago.me/read-manga/no_more_innocence/

https://www.mangago.me/read-manga/penthouse_xxx/