Try searching the Mature category with keywords like "romance", and narrow it down with two keywords Laurel seems to insert/tweak on these stories "older woman" and "younger man". Valentine's and Christmas themed stories seem to have a lot of these, so that may be a thing you could search for as well.
Of course, that depends upon my interpretation of "detail and depth". Going by my interpretation, I can't recommend anything in this pen name, and only sort-of recommend something I wrote as Les.