The year is 1999. Amamori Hajime is a typical elementary‑school student, juggling schoolwork and the antics of his eccentric friends. One day, while his father tests a piece of equipment he has been working on, the device explodes, destroying their house. Orphaned, Hajime is taken in by his uncle, an astronomer. At the observatory he meets a girl he has seen before and has developed a crush on. She is Yukino Yayoi, whose parents run a ramen shop in town, and she also serves as his uncle’s assistant. Yet Yayoi is not what she seems. There is a reason she helps Amamori at the observatory. She is the…