INTRODUCTION
mayuko's Halloween Series (前夜祭シリーズ, Zen'yasai Series) began with the release of Black Cats of Halloween (前夜祭の黒猫, Zen'yasai no Kuroneko) in October 2009.
Every year since, mayuko has released one (sometimes two!) songs to celebrate Halloween. The series is still ongoing as of , making it one of the longest-running VOCALOID song series.
This fansite aims to document each song in the series, providing information for an international English-speaking audience.
Useful links: