Ah, yes. Disappearance day. A very, very iconic and interesting time for Hatsune Miku. The day Miku disappeared. The world grieved her temporary disappearance, but soon, she returned more magnificent than ever.

The Disappearance of Hatsune Miku
By Muya Agami, cosMo@BousouP
An all-new, official Hatsune Miku light novel!
The Disappearance of Hatsune Miku is a new light novel based on Hatsune Miku―the singing, dancing, and gaming sensation that’s taken the world by storm! This self-contained, original novel was inspired by the Hatsune Miku song series of the same name, a collection of tracks so popular that they forced down the servers that hosted them, earning the name “The Disappearance of Hatsune Miku.” Soon after, Hatsune Miku grew into a huge multimedia phenomenon, with millions of fans worldwide.
Asano is a young university student tasked with testing out the technology department’s newest creation―the life-like android, Hatsune Miku. Although Hatsune Miku has a lot to learn, Asano comes to see her as more than merely a piece of tech and together the two learn what life and love is all about.