WILL-O'

 is a rock idol group formed in 2018. The group was previously known as Alloy.

Their latest system ended on March 31, 2021, with all members graduating.

Final Line-Up

 * Enomoto Ryo (榎本りょう; ) (Original Member; Graduated March 31, 2021)
 * Komori Uzura (小森うずら; ) (Original Member; Graduated March 31, 2021)
 * Kirino Miyu (桐乃みゆ; ) (Original Member; Graduated March 31, 2021)
 * Saeki Tsumiki (佐伯つみき; ) (Joined July 7, 2019; Graduated March 31, 2021)

Former Members

 * Sato Yuni (佐藤ゆに; ) (Original Member, Withdrew April 2, 2019)
 * Kanzaki Nono (神崎のの; ) (Original Member, Withdrew August 23, 2019 due to poor physical condition)

Albums

 * 1) [2020.12.25] Pack TRACKS

EP

 * 1) [2018.12.24] Jump! -Member Solo ver.-

Major Singles

 * 1) [2019.06.04] Kanjou Sensome Hikari Emotion (感情線染ヒカリエモーション)
 * 2) [2019.12.01] HANABI
 * 3) [2020.08.17] Baby's Breath

Digital Singles

 * 1) [2018.12.24] Jump!
 * 2) [2019.01.21] Innovator
 * 3) [2019.01.21] Last Dance
 * 4) [2019.02.28] Stardust Memories
 * 5) [2019.03.18] Identity
 * 6) [2019.04.01] Renshin Clumsy (恋心クラムジー)
 * 7) [2019.04.07] SPARKING
 * 8) [2020.05.31] I Will Hope
 * 9) [2020.12.25] Face Myself
 * 10) [2020.12.25] 4RAW