recs from hell

I want a REALLY specific experience and I have no idea who to ask.
basically i want to watch/read smt that was not tagged as romance and i didn't know there's a romance in it. maybe it's fantasy/ adventure/ slice of life whatever it was. maybe it follows a set of characters or just two idk. and as the story progresses more I start to root for the two and bam they end up together. the thing is I was expecting it to be not a romance so this IS a surprise.
does anyone have any recs like this? books or movies or shows or anything really. ik i would miss the of element of surprise romance since I'm asking for it now. but if anyone has smt similar to what I'm looking for (romance that comes second to the plot and then two characters that seems unlikely to end up together BUT THEY DO) I'll be grateful