ワールドイズマイン (World is Mine)

Background
The song is about a spoiled girl who believes herself to be a "princess" that the world revolves around, and her struggles with falling in love with a standoffish boy. There are many PV variations for this song, but the narrator is almost always portrayed as a short-tempered and fickle Miku (interesting because of the meek and sweet-tempered manner that Miku is often portrayed with) but with a "tsundere" side.

In addition to the Miku version of World Is Mine, called the "Women's Side", there is a "Men's Side" performed by Anima telling the story from the "prince's" point of view. There is also a version that mixes both the Men's and Women's Sides, making a complete story. Also, there are famous covers by other vocaloids including Kaito, Rin/Len Kagamine, Gakupo Kamui and Meiko. The lyrics in these covers are changed so that they match up with each characters perspective. There is a version for nearly every character.

"World is Mine" is very popular among female singers on Nico Nico Douga and Youtube, and has received multiple covers.