"In the winter of my fifteenth year, I must dedicate myself to Mr. ■■■."

Private detective Shida receives an email request. It is from Wakaba, a boy he met ten years ago in the rural village where he transferred to school and spent six months - his first love.

With his feelings for Wakaba still smoldering in his hazy memories, Shida ends up spending the night with him after their long-awaited reunion. Feeling a little awkward, he listens to the request again, learning that the village chief of his hometown, Negatane Village, had died mysteriously, and that it was a "curse" that had befallen him because Shida had run away from the village.

Shida, who had accepted the request out of love, heads to Negatane Village with Wakaba, half-believing it...