トルエン (Toluene)

Background
"Toluene" was first uploaded on September 19th 2011; and is currently the most recent song of the Benzene Series. Like it's previous songs, Paradichlorobenzene and Antichlorobenzene, it's uploaded at the exact same time and day. It reached Nico Hall of fame, though it's the least popular song of the series so far.

It's also featured in Owata-P's album "Benzene＼(^o^)／", and to date has over 160,000 views views. It's the first song in the series to feature another Vocaloid aside from Kagamine Len or Rin, and is also the first song to say "this song... has a meaning".