The mystery hook in episode one plants a question that rewatches will answer completely differently. The middle sags like it's just another school romance, but those three final episodes recontextualize everything that came before, turning what felt like filler into the actual story. By the time the time travel reveal lands, you're already emotionally invested in these specific people trying to save a specific autumn, and that's what makes it hit.
Sou Akiyama's Astronomy Club stands at the center of Uchihama Academy's final cultural festival before the old building closes forever. The event should be a celebration, a last hurrah for students and traditions alike. Instead, something is pulling the school into darkness. Ghost sightings haunt the corridors. Students collapse into inexplicable sleep. Accidents occur with unsettling frequency. The student council turns to Sou's club for answers, but nobody can explain what's happening. Then Yui Furukawa transfers in, a quiet newcomer who seems oddly connected to the strange occurrences. As the festival approaches, Sou realizes the mysteries aren't random at all. They're fragments of something larger, something that bends time and causality. The club must uncover the truth before the festival ends and an irreversible moment arrives. This is a supernatural romance wrapped in temporal uncertainty, where every conversation carries weight and every coincidence matters. It's for viewers who thrive in stories where mystery and emotion intertwine, where discovery comes through connection rather than exposition, and where the past refuses to stay forgotten.