Natsuzora no Monologue: Another Memory

In the small seaside town of Tokijima stands a great tower called the Tree — a structure that appeared without explanation thirty years ago, sparked a national sensation, and was then simply forgotten. When protagonist Aoi and her science club visit the Tree on July 29th, the day before their club is shut down, the tower begins to sing — and a time loop starts. The same day, over and over.