If the rain touches your foot and gives it a little rain kiss, you know that part of your foot is exposed to the elements. You can also see some dew forming on your exposed foot. So that's what rain kisses are!
You run along the road (ろ), trying to get out of the rain, but the road keeps going and going, with walls on both sides.
Currently there are no similar looking kanji which exist in the WaniKani learning system