Six childhood friends grew apart in high school. One of them is Jintan, now a shut-in. He gets a request to fulfill a wish for Menma, the only one of their friends to have stayed the same over the years. In order to grant her wish, he will have to find and reunite their old friends.
I've watch a lot of anime, and I have to say this is one of the BEST ending ever. The plot hit the spot on the very last episode. I recommend this anime so check it out.