On July 8, 2014, during the disbandment concert of BiS, First Summer Uika and Hirano Nozomi announced their plans to form a new group and intention to hold auditions.
The group made their debut as Billie Idle in March 2015, with the releases of "Anarchy in the music scene".
[4] In Summer 2016, Yasui Yuuhi quit the group due to health issues, and Momose Momo's sister joined as Akira in September of the same year.
[12] In February 2019, the group released the single, "Soshite, mata..",[13] followed by "Bokura Mada Chippoke na Koro no Hanashi" in May,[14] and finally "Last Orgy" in October.
According to their producer Nigo, the reason for their disbandment were difficulties within the company and insufficient commercial success.