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. Odd things soon start happening. Glowing lights float about, and the eyes of cats and dogs reflect shapes that look like UFOs. A girl named Miku seems to know more than she admits. Then there's Wakkun, a peculiar boy who wears the clothes Ayumu wore as a child. Far away in Yokohama, a withdrawn high school girl named Kisa Tanigawa takes in a wounded sphere of light. As Ayumu settles into the rhythm of small-town life, he finds himself caught between the ordinary and the inexplicable, with quiet everyday moments interrupted by mysteries that stay unexplained.