A few days before summer vacation, Natsumi Aizawa falls out with her friend, Saki Mizukoshi, when she decides to quit the tennis club. The next day, Saki reveals she is transferring schools, which upsets Natsumi. Wanting them to make up, their other friends Yuka Hanaki and Rinko Tamaki call Natsumi and Saki to a large rock at a shrine temple they used to visit in their childhood, said to grant wishes to friends who wish for the same thing...