Aoi Tsuki no Yoru, Mou Ichido Kanojo ni Koi wo Suru

In August, a Blue Moon occurs—a rare event where two full moons appear in one month. A seventeen-year-old visits their grandmother's home in Arashiyama, Kyoto, for a funeral. During this quiet time, they encounter a girl of similar age by a spring, using an umbrella to collect water under the moonlight. She tells them she will remain until the Blue Moon ends and carries an enigmatic presence. She reveals she has been waiting for them from the future. The story follows the connection between these two individuals, linked by fate in a tale of love that transcends time.