Set towards the end of World War II, Kaede Itakura, who leads kindergartners, and Mitsue Nonomiya, who enjoys music, persuades the parents at the school to take their children out of Tokyo. They seek shelter at an abandoned temple in Saitama while Tokyo is bombed.

High schooler Shiori lives with her education-minded mother. Struggling with her life in Tokyo, she travels on behalf of her grandmother to the mystical island Yakushima, where she meets a robot.

Nana is a young hostess of Nakajima Inn in a town by the sea. At the beginning of September when Nakajima Inn is closed for business, a young man, Shuntaro appears and says that he really wants to stay at the inn. He explains that he lost his loved one a month ago and she had stayed at the inn just before she died. In order to follow the deceased lover's footsteps, Shuntaro wanders around the town and the beach day and night. Nana who's been watching Shuntaro's behavior volunteers showing around the town and finds herself hanging about with him a lot. This is the town she knows more than anybody. Moreover, just like Shuntaro, she is also the one who lives with the pain of losing loved ones. Nana and Shuntaro spend time together sharing each other's secrets, influencing each other and eventually, their frozen time starts moving.

Nagasaki in 1986. Hisada, who lives with her affectionate parents and her younger brother, although there are many quarrels between couples, is a fifth grader who loves Yuki Saito and Exogini. Hisada decides to go to Boomerang Island to "see the dolphins" with Takemoto, whose house is poor and avoided by his classmates. Drowning in the sea, getting entangled in the Yankees, and having a lot of trouble, but as the friendship between the two deepens as a result of this adventure, a sad incident that presages farewell occurs.

A 100-year-old resident of a Lake Biwa nursing home dies mysteriously. Did a respirator keeping him alive suddenly malfunction, or was he murdered? A young detective on the case meets a female caregiver. The investigation runs into a dead end, but the two fall into a passionate but forbidden relationship. Terrifying memories emerge from the vast, deep lake to ensnare the detectives on the case, the caregivers, and a reporter trying to uncover a hidden past.

Ryusuke, who is grieving, makes salt on the day of his wife's funeral, aiming to preserve the local salt's history.