The gameplay system is based around filling a gauge by gathering star items. When the gauge is full, a border activates, with different effects based on the color of the gauge.

One summer, Gensokyo had been experiencing meteor showers for several nights in a row. The meteors' fragments contained magical power that could make one feel happy by just looking at them. As a result, the meteor showers would come to be referred to as a "miracle"; Rumors began to spread that the meteors could make dreams come true, and the upcoming Summer Night Festival was renamed to the "Shooting Star Festival".

Reimu Hakurei (with Shinmyoumaru Sukuna), Marisa Kirisame, Sanae Kochiya, and Koishi Komeji, having caught wind of the continuous meteor showers, went out to investigate the source of the meteors' magic.