There is a legend in the city that a young female ghost called the Summer Ghost will appear at the moment when fireworks are set off. Sugizaki Tomoya, who cannot live up to his expectations, Harukawa Aoi, who is gentle but bullied, and Kobayashi Ryo, who is good at socializing but suffers from a chronic disease, are three high school students who met on the Internet. They all have reasons to see the Summer Ghost. In the cool evening breeze of the summer night, they light fireworks together.