Something in the rain is one of my favorite Kdrama ever. The chemistry between the main leads is crazy good and the story's very interesting. It's a realistic drama, there's no cliché. The age gap is an important thing since the woman is older than the man. You'll get to see the reactions from everyone (family, friends) and the difficulties that the couple is going to get through. You'll see the growth of the couple throughout the show while not really knowing what's going to happen in the end. The acting is spot on! (specially the mother)
What I really liked was for sure the chemistry, it's not like any couples that I saw in k dramas, they're overly cute and acting like a real couple not like those cliché ones. Family is very present in this drama, they are the ups and down of this couple but not in a cheesy way. Everything's persecuted greatly!
Warning: it is a slow pace drama, you might like it or not but as you continue to watch the drama, you'll get more hooked to it, I'm sure. There are of course cliff hangers at the end of the episodes which makes you want to continue the episodes.