If it helps, her ex wanting her back is one-sided! I'm pretty sure she and Ren are together now though I too wonder how much story there is left to tell (as someone who never cared about Ren's weird backstory lol).

Re: YAMG - I enjoyed the main story as a light josei novel and skipped the extras. It's good reading practice too! I just liked that the characters are in their 30s or something and that the FL was the more "successful" one and the ML who was in a somewhat relatable position of floundering in his career path didn't resent her for it.