Soundless Voice / Proof of Life / Endless Wedge

Proof of Life, Soundless Voice, and Endless Wedge is a series of songs made by Hitoshizuku-P and illustrated by E-Ri and Yucco. Soundless Voice, sung by Kagamine Len, was uploaded first, and Proof of Life, sung by Kagamine Rin, was uploaded the next day. In Hitoshizuku-P's album, it was revealed that 'Endless Wedge' is connected to Proof of Life and Soundless Voice, telling what happens to Len after Rin died.

Background
The series tells a story about a girl (Rin) who knew that she was about to die, and a boy (Len) who takes care of her. In the end, the girl died because of her sickness, before Len could even tell it straight to her that he loves her.

Endless Wedge
Sung by Kagamine Len
 * Music and lyrics written by Hitoshizuku-P
 * Mixing by Yama△

Endless Wedge happens not too long after Rin died. Len remembered the days he spent with Rin, he wanted to hold her again, and remembered the times they spent together. How Len gave her happiness, and how Rin gave her smiles for him, he wondered about the future of them together.
 * Available in STORIA (Album)
 * Available in Hitoshizukushi (Album)

In lonely nights, Len remembered Rin's singing voice, helplessly crying. He sang Rin's song, 'I do not want to sing a sad song' (the lyrics from Proof of Life).

Len remembered Rin's voice, it was still there, and in the end he said, forever he will always love Rin.