What is your favorite song with Rin and Len?

I ADORE this one.
Synchronicity - 2/3 Paradise of Light and Shadow.

3rd part isn't out yet.. But the developers confirmed they're releasing it soon.

I love Luka in this... Oh wait, I always wuv her! ^^

Though I don't support twincest. :3

My favorite is actually two songs that for the first one Len sang to Rin and it's called "Prisoner". Her answer song is "Paper Planes". Sorry, no video but here's an explanation.

Basically it tells the story of a boy(Len) that is a prisoner at the facility where a little girl(Rin)'s father works. The see eachother one day and exchange paper planes with messages written on them. Everyday they did this exchange and they grew to love eachother. One day Rin sent a plane that said she was leaving. Although terribly sad, Len sent her a reply that said he'd wait for her. And he'd treasure the planes he already had. Len, as a prisoner, had a shaky existance in the facility and one day they came in to check his cell. They found the paper planes and the Rin's father knew they were from her. So he wished to punish him. Len was beaten and was nearly dead. The whole time he thought about seeing her one more time.

In "Paper Plane" it shows Rin's side of the story and you see that she had been sick and had only barely gotten the energy to do the exchanges from her deep love of Len. But even when she loved him dearly, she knew she would soon die. So she sent him the plane with the message that she would be leaving. Stuck in bed, she regreted not saying the truth and being a coward because she knew he would be waiting. And as she died, she too thought of only seeing Len one more time.

Very sad but it's my favorite. :D

Trick or Treat