Halloween Requiem

Background
This song tells the story of a Halloween night some time in the future where, because of carelessly-performed magic, evil spirits are set free into the world. The spirits, taking the form of creatures from classic Halloween costumes and wreak havoc on the world, but are sealed away again at dawn. The song ends with a moral, "If you choose to laugh at evil, make sure you think twice".

Trivia

 * Though Halloween Requiem was first released as a "version 1" on VocaloidOtaku.net just before Halloween 2009, it was not released on YouTube as a "version 2" (though not under that name) until a year later for Halloween 2010.
 * Though the song uses the voices of Lola, Leon, Miriam, and Sonika, Koda-P has never used those voices in any other songs. Sonika's line was credited to a user named CrossFrown, while the other lines remain unspoken for.
 * Sweet Ann and the Crypton Vocaloids make a cameo in the PV, but has no lines.
 * The song and PV together won 1st place at the Citrus College Film Festival in 2010, awarding a prize of $150. Koda-P has mentioned in a Skype conversation that a third of the money went to the PV artist, Myst-Saphyr.
 * Halloween Requiem's PV was the earliest known collaboration between Myst-Saphyr and Koda-P.