Len Kagamine and Rin Kagami have been best friends since they were kids. During the winter, Rin catches a horrible illness. Unfortunately she does not make it. Sadness overwhelming him, Len just now realizes that he wanted to confess his feelings to Rin before it was too late. With Rin gone from the earth, will Len stay true to his feelings and only love Rin? Or will he move on? Some will say the second option.. but he has no idea that his love, Rin, is an angel watching him from heaven. But can their love truly last forever? *Based on idea of "Proof of Life" and "Soundless Voice" I do not own the book cover nor do I own Vocaloid.