Aizawa Ayumu, a young boy, is sent to the small town of Tana to stay with his father for a while. Though he is reluctant, he agrees when his mother offers him a mountain bike. Ayumu had previously lived in Tana, but his memories of that time are now shrouded in mystery, as something significant happened during his childhood. In Tana, he encounters Miku, a young girl who knows more than she reveals; mysterious glowing lights that drift around; cats and dogs whose eyes reflect UFO‑like images; a nosy female announcer; a forest steeped in a mysterious past; and Wakkun, an odd boy who wears the clothes Ayumu once wore as a child. Together, they weave the enigmatic world of *Zettai Shounen*, where mysteries linger, leaving the town steeped in secrets.