Natsumi wants to become a photographer. She takes a bike which her late father left behind and goes to a forest to find a firefly she saw with her father. In the forest, Natsumi meets old mother Yasu and old son Jizo. They run a general store. Natsumi learns how to live in nature from them. She has happy summer days there. One day, Jizo tells her that he became estranged from his son in the past.
有村架純
as Natsumi Kawai
工藤阿須加
as Shingo
光石研
as Keizo Fukui
村上虹郎
as Kimihide
小林薫
as Sakakiyama
