3 years on from hospitalité, Kiki Sugino and Koji Fukada are back again with this socially-conscious film about a 18-year-old girl in-between adolescence and adulthood who spends a summer in a valley and enjoys romance. Sakuko, a 18-year-old girl studying for her university entrance exams, decides to accompany her aunt Mikie on a trip to a seaside town. There she befriends Takashi, a refugee from Fukushima who has dropped out of high school and works at a motel run by Ukichi, a friend of Mikie. In-between childhood and adulthood, Sakuko starts to understand the difficulties of becoming an adult.

This work is a 12-year story of Mana, a woman who cannot accept the death of her best friend, staring at her as she tries to step forward while having deep sorrow.