Sou, a member of the Astronomy Club, finds his ordinary high school life turned suddenly upside down.

After Yui's sudden and mysterious appearance, the Astronomy Club gang tries to make her feel welcome as she struggles to figure out what she is doing at Uchihama Academy.

The Astronomy Club at Uchihama Academy is enlisted by the school council to investigate spectral encounters and strange mishaps.

The Astronomy Club at Uchihama Academy is enlisted by the school council to investigate spectral encounters and strange mishaps.

The Astronomy Club at Uchihama Academy is enlisted by the school council to investigate spectral encounters and strange mishaps.

The Astronomy Club members discuss the career paths everyone plans to take after high school, but Sou finds out that Nagisa's path is further complicated by an arranged marriage.