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At Kichijōji Station, Tokyo, Taku Morisaki glimpses a familiar woman on the platform opposite boarding a train. Later, her photo falls from a shelf as he exits his apartment before flying to Kōchi Prefecture. Picking it up, he looks at it briefly before leaving. As the aeroplane takes off, he narrates the events that brought her into his life...

Mio is a girl in high school who slacks off. She and her childhood friend Arata and best friend Madoka spend their after-school days in Ikebukuro hanging out. One day, Madoka tells Mio that she loves Arata, and Mio realizes that she loves Arata, too. But she’s scared of their relationship falling apart and lies, saying she’ll help them. Mio deliberately acts coldly to Arata, and they get into a fight. She decides to work things out with Arata, but gets into a car accident on her way to meet him. She wakes up in a mysterious world. It's the Ikebukuro she knows, but something’s different...

One fateful summer, a group of elementary school kids set adrift on an abandoned apartment building must look within themselves to find a way back home.

Shin-chan is approached by his time-traveling future bride-to-be Tamiko, who asks him to help save his adult self from the ruler of Neo Tokio.

Three moments in Takaki's life: his relationship with Akari and their forced separation; his friendship with Kanae, who is secretly in love with him; the demands and disappointments of adulthood, an unhappy life in a cold city.

An urban legend says that lighting fireworks at an abandoned airfield will beckon the "summer ghost," a spirit that can answer any question. Three teenagers, Tomoya, Aoi, and Ryo, each have their own reason to show up one day. When a ghost named Ayane appears, she reveals she is only visible to those "who are about to touch their death." Compelled by the ghost and her message, Tomoya begins regularly visiting the airfield to uncover the true purpose of her visits.

Koyomi Hidaka and Shiori Sato meet at his father’s research center and begin to fall in love, but so do their parents, who eventually marry. To avoid becoming stepsiblings, they decide to run away to a parallel universe. Traveling between dimensions is common in their world, but not without repercussions. Does a universe exist for the young couple, and what will it cost them to find it?

Twenty-six-year-old Hiroto Suwa; his wife, Naho; and their old high school classmates—Takako Chino, Azusa Murasaka, and Saku Hagita—visit Mt. Koubou to view the cherry blossoms together. While watching the setting sun, they reminisce about Kakeru Naruse, their friend who died 10 years ago. Mourning for him, they decide to visit Kakeru's old home, where they learn the secret of his death from his grandmother.