Ano Hi Mita Hana no Namae wo Boku-tachi wa Mada Shiranai

Story

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.       

Alternative title
Synonyms: AnoHana
Japanese: あの日見た花の名前を僕達はまだ知らない。