軌道上の忘れ物

In the 2030s, Sora Tadokoro, a university astronomy club member, discovers a mysterious light point in old space observation data.

It has been drifting in orbit between Earth and the Moon for over 50 years—since 1978—completely unknown to anyone.

Who launched it? For what purpose? And why was it forgotten?

As Sora and his friends investigate, they uncover a hidden truth from the Cold War era. A story about young people pursuing the truth and facing ethical dilemmas.