Letters from a Sakura Tree(桜からの手紙 〜AKB48 それぞれの卒業物語〜)

A soon-to-be-graduating girls, in high school, find out that their homeroom teacher is terminally ill. He writes each of them inexplicit letters. While they encounter various difficulties in their senior year those letters will help them to resolves their personal issues and grow to be better persons and friends.