Nakisou Sunday

 is the fourth digital single released by BILLIE IDLE®. It was released on October 5, 2016. It is the first single to feature Momose Momo's younger sister Akira.

Tracklist

 * 1) Nakisou Sunday (泣きそうサンデー)

Featured Members

 * First Summer Uika
 * Hirano Nozomi
 * Momose Momo
 * Akira