ベイビーユー (Baby You)

Background
"Baby, you" is a song composed by Hidarigawa-P, and is her 16th Vocaloid original work uploaded to Nico Nico Douga. It's some of her notable songs, the others being "Sealed Headphones" sung by Kagamine Len and "Cosmetic Love" sung by Kagamine Rin and Len. Later on March 2nd 2012; votes on JOYSOUND began.

The song is rather simple and straightforward, and tells Len's story / background on his friend/love relationship with Rin. He can't bring himself to say it, and all were only thoughts in his head. In the end, Rin (presumably her thoughts/mind) said she loves him as well.