Ashley

I don't know in what aspect you want it to be similar (I hope that not cheating on husband/wife). Try these:
- https://www.mangago.me/read-manga/bastian/
- https://www.mangago.me/read-manga/what_it_means_to_be_you/
- https://www.mangago.me/read-manga/the_broken_ring_this_marriage_will_fail_anyway/ - it's smut so don't read if you don't like
- https://www.mangago.me/read-manga/cry_even_better_if_you_beg/

Thanks for this! but yeah definitely not the cheating part hahaha I just want a slow burn romance lol.

Then if you want slow burn try second link. They mended their relationship to passable state after just around 100 chapters XD