Ano Hi Mita Hana no Namae wo Bokutachi wa Mada Shiranai(2331)

Other Title(s)anohana: The Flower We Saw That Day
Genre(s)Slice of Life, Comedy, Drama
SynopsisSix 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.

(Source: ANN)