The Disappearance of Hatsune Miku is a Japanese novel based on a song. It's licensed by Seven Seas Entertainment.
Review:
You have no idea how excited I was to learn that 1) a Vocaloid light novel existed and 2) it was available in English. I ordered a copy for myself a few weeks after finding out about it.
A few years ago I was really into Vocaloid (singing synthesizer software). I wasn’t interested in using it myself, just in listening to other people’s songs and reading about the various Vocaloid and UTAUloid avatars. I gradually found a few Vocaloid/UTAUloid tuners I particularly liked (kyaami is my top favorite) and developed a few Vocaloid/UTAUloid preferences (Kaito was probably my first favorite Vocaloid, and Ritsu continues to be my favorite UTAUloid).
I went into this book with an okay background knowledge of Vocaloid in general and Hatsune Miku in particular. Also, I was familiar with the song the book was based on (here's one version on YouTube), enough to know that the book probably wouldn’t have a happy ending.
The Disappearance of Hatsune Miku stars Shinosato Asano, an ordinary university student who spends his days going to class and doing tedious work at a robotics lab and his nights working as a bartender at a nightclub. He’s shocked when the professor in charge of his research lab singles him out to do a field test of a very special new android named Hatsune Miku. The professor wants a student like Asano, who’s responsible, can keep a secret, and doesn’t know too much about artificial intelligence, to see how well Miku can pass for human out in the real world. He’s not supposed to tell anyone, not even his family members, what Miku really is, and he has to make sure Miku goes back to the professor for regular data collection and weekly maintenance.
Miku’s speech and behavior is a little odd and stilted at first, but it rapidly improves. Asano introduces her to everyone as his very intelligent cousin from England (in order to explain why a 16-year-old girl whose Japanese is still a bit rough is suddenly attending university classes), takes her on a tour of the university, and invites her out to lunch. Lunch becomes their regular activity together, and Asano gradually incorporates activities relating to music once he realizes that Miku particularly enjoys it. He starts to realize, to his dismay, that he might be falling for her. What will happen once the field test is over?
