Ano Hi Mita Hana no Namae wo Bokutachi wa Mada Shiranai.

あの日見た花の名前を僕達はまだ知らない。

Jinta Yadomi and his group of childhood friends have become estranged after a tragic accident split them apart. Now in their high school years, a sudden surprise forces each of them to confront their guilt over what happened that day and come to terms with the ghosts of their past. (Source: NIS America)