One day, college student Iwai receives an introduction for a job as an assistant to a mycologist. Upon his arrival, he is met by Murota, a seemingly moody and unsociable man. Iwai is uneasy at first, but he finds he enjoys the days he spends coming into contact with a world previously unknown to him, as well as looking after Murota when he forgets to look after himself. And, in the midst of it all, Iwai realizes his heart is gradually being drawn to Murota...

Once upon a time, Marcel's sister fell in the forest while gathering herbs. Her injuries were grave and Marcel was at a loss for what to do, until a fearsome horned man appeared, offering help-in exchange for a promise. Now, ten years later, Marcel returns to the woods, steeling himself for death. Instead, he finds something quite different: a gentle soul, friendship...and perhaps something more.