This novel circles a lot of tropes (enemies to lovers, grumpy sunshine) without actually landing.  There isn’t enough backstory to make their relationship- both initially as enemies and eventually as lovers- believable.   Our guy is too grumpy.  Our girl is too bubbly.  It all leans too hard into the tropes without enough substance for me to become invested. 
There is a fun subplot involving love letters from the past, and at times I was more interested in that plot line than our main one.  
Overall, this was a miss for me. 
I received a NetGalley arc of this story in exchange for my honest review.