Hi guys, can you recommend me a modern straight romance manhwa or manga but not an office ...

Try these:

https://www.mangago.zone/read-manga/what_kind_of_rice_cake_is_this/

https://www.mangago.zone/read-manga/our_secret_alliance/

https://www.mangago.zone/read-manga/between_jaeyoung_and_jaeyoung/

https://www.mangago.zone/read-manga/why_don_t_i_have_anyone_by_my_side/

https://www.mangago.zone/read-manga/a_guide_to_proper_dating/

https://www.mangago.zone/read-manga/a_campus_romance_i_guess/

https://www.mangago.zone/read-manga/romantic_killer/

https://www.mangago.zone/read-manga/90_s_cram_school_for_unripe_apples/

Awesome
https://www.mangago.zone/read-manga/awesome/

Wow thank you.

Hi thank you so much. I appreciate it..

https://www.mangago.zone/read-manga/darae_s_big_love_story/

Have you read this one yet?

Or this one
https://www.mangago.zone/read-manga/two_weeks_and_counting/