COMPLETE/Sequel is available to read on profile/ A cyborg, Rin, is created as the key to answering to a madman's wish: her father's. However, she escapes to Japan, in hindrance. Now on a mission to regain her lost past, Rin finds herself helplessly drawn to teenage life, drama, and Len Kagamine.

Len was a an abused kid who is adopted by the Megurine family and finds an interest in Rin who has a shroud of mystery enveloping her.