Vocaloid. They are beings created to sing, unique muses and idols to the world.

However, due to their rarity, their value and price have skyrocketed to the point where a debut was nothing more than an impossible dream for you, an aspiring producer.

Then one day, while passing through an alleyway, you discover a Vocaloid you've never seen before inside an abandoned box.

Thinking to yourself, "There's no way it works, right?" you somehow manage to bring it home. After figuring out how to operate it and turning on the power...

A life together with a robot girl begins.