Nagasaki in 1986. Young friends Hisada and Takemoto decide to go to Boomerang Island to "see the dolphins". The friendship between the two deepens as a result of this adventure.

Nana runs an inn called Nakajima-so in a seaside town. One day, a young man named Fujii Shuntaro comes to visit and reveals that his girlfriend stayed at the inn one year prior, just before she died. Following in the footsteps of his lover, Nana takes on the role of guide and joins Shuntaro as he wanders the town.

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.

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.

Yuka is on her way from a company party when she sees a young man running through a shopping street carrying a pillow. White feathers dance around him, and he leaves like an angel. Later, she encounters the young man again. His name is Satotaro, and he seems to have escaped from the hospital. He innocently takes Yuka, saying, "I have somewhere to go. A mysterious escape of a city-weary woman and a lonely young man begins.

Screenwriter Kurata meets his granddaughter Yui, who has traveled 50 years into the past to warn him that if he doesn’t rewrite his TV drama script, the entire genre of television drama will vanish in the future. As they fight to preserve the future of the medium, they are forced to reckon with the consequences of their actions—at the cost of Yui’s very existence.

The love and conflicts between mother and daughter, and between husband and wife. The final chapter of Nakagawa Ryutaro's trilogy, depicting the forms of love that endure through loss and rebirth.