It's been six days since the nightmares began. The same rooftop, the same blue sky, the same boy. Even when you reach out to the boy falling into the sky with a smile, your hand grasps nothing. No matter what you does, he never changes in the dream. Amidst those days, you met Yuu Takanashi. An utterly ordinary park. Swings, a slide, horizontal bars, and a bench. On that rusty bench sat the flash of red you'd seen countless times in your nightmares.