A year has passed since Menma's ghostly return to the Super Peace Busters. Although the time they spent together during that summer was short, the five members reminisce about what happened as they each write a letter to their lost friend.
- Genre: Animation, Drama
- Studio: A-1 Pictures
- Keyword: love triangle, loss of loved one, friendship, supernatural, growing up, romance, slice of life, unrequited love, coming of age, childhood friends, ghost, aftercreditsstinger, seinen, anime
- Cast: Miyu Irino, Ai Kayano, Haruka Tomatsu, Takahiro Sakurai, Saori Hayami, Kondo Takayuki