ひとりにしないで。 (Hitori ni Shinaide.)

ひとりにしないで (Hitori ni Shinaide / Don't Leave me Alone) is a song composed by Putin-P and sung by Kagamine Rin, and Kagamine Len; with several parts sung by Ronald McDonald.

It's the most notable song from Part 1; and is the first track of numtack05's Putin-P Series;　Track 01 of Part 1.
 * Nicovideo broadcast
 * Youtube broadcast

Background
The song was first uploaded on January 17th 2008. It's previous song; It's the End was Track 0, though both Don't Leave me Alone and It's the End are the first tracks of Part 1 & the series.

The song talks about how Rin doesn't want to be alone, she wanted to be with Len. She tried calling Len, and he gave a lame of excuse saying, "I don't know how to use my phone". Len talked about the fight in Russia, and he mentioned a few wrestling moves afterwards. For the next one minute of the song, Rin kept on singing 'don't leave me alone', along with Ronald's "LAN LAN LUU".

Japanese and Romaji Lyrics
ヒトリニシナイデヒトリニシナイデヒトリニシナイデ x66 Hitori ni shinaide hitori ni shinaide hitori ni shinaide x66