My apologies if this is in the wrong place, but it turns out their making Halyosy's song, Sakura no Ame, into a novel. Quote by Anime News Network.
The Mainichi Shimbun paper's Mantan Web site reported on Tuesday that "Sakura no Ame," a song popularized by the virtual idol singer Hatsune Miku, is being adapted into a novel. The song about graduating students, created by musician Haruyoshi Mori of the three-man acoustic group absorb, gained popularity online when he uploaded a version of the song performed by Hatsune Miku to the Nico Nico Douga video service. Since then, it has become a popular song at Japanese graduation ceremonies and was made into a live-action film.
The novel depicts Hatsune Miku as a high school student in the school's choral club who interacts with other popular Vocaloid characters such as new club members Kagamine Rin, Kagamine Len, and Megu. Miku and the other characters are shown as they spend time together while graduation approaches.
The novel will be written by Ryō Fujita, and Mori, also known as halyosy, is credited as the novel's original creator and for its original concept. Illustrations for the novel will be drawn by illustrators Yu, Yoshida Dondorian, Karu, and Batako. It will reportedly be released on March 23, but is already for sale in Japan.