A boy returns to a town that erased itself from his memory, and nothing in the way people talk to him explains why. The girl who knows what happened won't say it out loud, the strange lights in the sky keep multiplying, and his own mind keeps refusing to give him back what it took. By the time you understand what actually happened to him in Tana, you'll realize the show spent the whole series showing you how trauma protects itself.
Ayumu returns to his childhood hometown of Tana after years away, lured back by his mother's promise of a new mountain bike. The small rural town feels familiar yet foreign, haunted by gaps in his own memory. Something happened here when he was younger, something he can't quite recall. Strange occurrences begin almost immediately. Unexplained lights drift through the forest at night. Animals seem to reflect impossible things in their eyes. A mysterious girl named Miku appears to know far more about Ayumu's past than she should. Then there's Wakkun, a peculiar boy who wears clothes identical to ones Ayumu wore as a child, speaking in riddles about events long forgotten. As Ayumu settles into the rhythm of small-town life, he finds himself caught between the ordinary and the inexplicable. Each day brings quiet moments of normalcy interrupted by fragments of something larger lurking just beyond understanding. The truth about what happened in Tana waits somewhere in the fog of his own lost memories, and uncovering it might change everything.