Legend of the Doll (2006)

Ryota, a collector of model figures, receives a box with doll parts from a mysterious shop in Akihabara. After assembling and customizing them, the figurine magically turns into real, android-like, woman named Airu. After learning how to speak more naturally, Airu finds a picture of Ryota's ex-girlfriend Yuria and tries to understand what happened in their past.