Two boys lived in a village: Yoshiki and Hikaru. The two did everything together...until the day Hikaru was encompassed by a mysterious light. That was when everything changed—Hikaru most of all. Yoshiki still wishes from the bottom of his heart to always stay by his side...but is there even a Hikaru left to be with?

Two boys grew up together in a certain village—Yoshiki and Hikaru. One day, Yoshiki became sure that Hikaru was no longer himself. He resolved to accept the new “Hikaru,” whatever happened to his friend. But now he’s decided to research the history of “Nounuki-sama” and Kubitachi to understand what this creature truly is. The situation evolves unpredictably, outside the boys’ control. Who will make the next move, and what will they find?