"4 in 1" THE OFFICIAL BOOTLEG

 is the first mini album released by BILLIE IDLE®. It was released on April 6, 2016.

Tracklist

 * 1) くわれそう - Momose Momo
 * 2) 恋のマジカルバイブレーション - First Summer Uika
 * 3) by - Yasui Yuuhi
 * 4) どうせ消えてしまう命なら... feat. First Summer Uika、Kamiya Saki、Tentenko、Michibayashi Rio - Hirano Nozomi

Featured Members

 * Hirano Nozomi
 * First Summer Uika
 * Yasui Yuuhi
 * Momose Momo