The story of some senior high school students in a Chinese village, their dreams, friendships and romances.

This story involves the shopkeeper Suzuri of Kokumondou who sells historic books and Mizuki, granddaughter of the land owner. When Mizuki releases a somewhat cute young spider demon out of a sealed book, the pair investigate the origins behind it.

Among the ruins of the city, there is a game only children can play. It is called “Otokoyo”; a game of hide-and-seek. But whenever children play this game, one by one they would disappear into the blinds of the buildings… The story begins when a boy enters the world of Otokoyo, to find his missing sister.

The summer of his high school freshman year, Hodaka runs away from his remote island home to Tokyo, and quickly finds himself pushed to his financial and personal limits. The weather is unusually gloomy and rainy every day, as if taking its cue from his life. After many days of solitude, he finally finds work as a freelance writer for a mysterious occult magazine. Then, one day, Hodaka meets Hina on a busy street corner. This bright and strong-willed girl possesses a strange and wonderful ability: the power to stop the rain and clear the sky.

Maquia is a member of a special race called the Iorph who can live for hundreds of years. However, Maquia has always felt lonely despite being surrounded by her people, as she was orphaned from a young age. She daydreams about the outside world, but dares not travel from her home due to the warnings of the clan's chief. One day the kingdom of Mezarte invades her homeland. They already have what is left of the giant dragons, the Renato, under their control, and now their king wishes to add the immortality to his bloodline. They ravage the Iorph homeland and kill most of its inhabitants. Caught in the midst of the attack, Maquia is carried off by one of the Renato. It soon dies, and she is left deserted in a forest, now truly alone save for the cries of a single baby off in the distance. Maquia finds the baby in a destroyed village and decides to raise him as her own, naming him Ariel. Although she knows nothing of the human world, how to raise a child that ages much faster than her.

Hinako is a surf-loving college student who has just moved to a small seaside town. When a sudden fire breaks out at her apartment building, she is rescued by Minato, a handsome firefighter, and the two soon fall in love. Just as they become inseparable, Minato loses his life in an accident at sea. Hinako is so distraught that she can no longer even look at the ocean, but one day she sings a song that reminds her of their time together, and Minato appears in the water. From then on, she can summon him in any watery surface as soon as she sings their song, but can the two really remain together forever? And what is the real reason for Minato’s sudden reappearance?

Miyo "Muge" Sasaki is a peculiar second-year junior high student who has fallen in love with her classmate Kento Hinode. Muge resolutely pursues Kento every day, but he takes no notice of her. Nevertheless, while carrying a secret she can tell no one, Muge continues to pursue Kento. Muge discovers a magic mask that allows her to transform into a cat named Tarō. The magic lets Muge get close to Kento, but eventually it may also make her unable to transform back to a human.

High school student Aoi lives with her elder sister, Akane, after a tragic accident took their parents away 13 years ago. Because Akane has since been taking care of her single-handedly, Aoi wants to move to Tokyo after her graduation to relieve her sister's burden and pursue a musical career, inspired by Akane's ex-boyfriend Shinnosuke "Shinno" Kanamuro. Shinno was part of a band until he left for Tokyo to become a professional bassist after the sisters' parents passed away. One afternoon, while Aoi practices her guitar in a guest house, she gets startled by the 18-year-old version of Shinno from 13 years ago! As if by coincidence, the current 31-year-old Shinno also returns to the town, but he has changed drastically. There are now two Shinno's in existence, but why is the Shinno from the past present? The story revolves around these four individuals as they confront their inner feelings toward each other and make decisions that will affect their lives from here on out.

Year 2027, The city of Kyoto has undergone tremendous advancement. Within the city lives Naomi Katagaki, an introvert and Ruri Ichigyō, a girl with a cold personality. Both share a love for reading books. Despite having similar interests, Naomi is afraid to approach Ruri due to her unfriendly nature. One day, as Naomi goes out for a walk, a crimson aurora pierces through the sky for a brief moment. Shortly after, he sees a three-legged crow and a mysterious man who reveals himself to be Naomi from 10 years in the future, explaining that he has come to change a tragic event that happens to Ruri shortly after they start dating. Naomi follows his future self's instructions and starts getting closer to Ruri, determined to save her. With the help of his future self, Naomi begins his preparations to save Ruri. Will he be able to change the future?

One day a young woman named Blanca is saved by Xuan, a snake catcher from a nearby village. She has lost her memory, and together they go on a journey to discover her real identity, developing deeper feelings for one another along the way. But as they learn more about her past, they uncover a darker plot of supernatural forces vying for power, with the fate of the world hanging in the balance.