For whatever reason, this song popped into my head today. "merodiii, something something sommeething." At first I was like... where was this song from? I couldn't remember, but after going down the list of anime I watched on myanimelist.com I remembered it was the ending from Tokyo Magnitude 8! It's about a young brother and sister, who are caught in an earthquake and have to make their way back home. Great, emotional story, I'd recommend it to just about anyone. I watched it about 2 years ago now (I think).
Enjoy :) This song is great on a sunny spring/summer day.