あらすじ
Oto-chan, a girl I used to play with 10 years ago. The comparison of their backs together, the password just the two of them, and the promise of reunion and marriage. Hajime Aoma lives a dull high school life with small but never-fading memories in his heart. And then came the ``promised day'' with Oto-chan. When Hajime arrives in front of the tree where they vowed to meet again, an astonishing sight spreads out in front of him. A captivating and terrifying nostalgic suspense!