Hitoshi had been in Sakimihara Gakuen for three months and he still hadn’t joined a club. The astronomy club was in danger of disbanding due to the graduation of the third-year students and retirement of their advisor. He ended up being half-forced to join the club by the scheming of his older cousin and teacher Sakura. He met the other members of the club: energetic transfer student Supika, gentle neighbour Kano, shy senpai Sari, childish-looking but reliable Ayane. They were all new to astronomy as well, so their first outings were full of fumbles. However, as time progressed, they gradually began to change.