In the 1970s, when the world was not yet as complex as it is today, two children—Sayo Narumi and Takahiko Honokida—embarked on a mysterious adventure through the pages of a strange book titled The Seven Nights’ Tale. Their journey through seven magical nights left a profound mark on them. Yet, neither Sayo nor Takahiko ever remembered what had happened in that “night world.” Nearly thirty years have passed. Now, in the year 2010, Sayo’s son, Kai, and Takahiko’s daughter, Rira, find themselves classmates at the same elementary school their parents once attended. Will these two children also be drawn into the world of The Seven Nights’ Tale? Set in contemporary Japan, this gentle yet vivid story follows the subtle changes in Kai and Rira as they grow from age ten to eleven. With a keen eye on the world surrounding children and the quiet beauty of ordinary life, the narrative gradually moves toward that fateful day in 2011. Twelve years after the original novel The Seven Nights’ Tale, this is a new story for a new generation—children living in the world of tomorrow.