26-Ji no Masquerade

 (26時のマスカレイド; 26 o'clock masquerade, also known as ニジマス; Nijimasu) is an idol girl group formed in 2016.

Current

 * Kurusu Rin (来栖りん)
 * Yoshii Miyu (吉井美優)
 * Mori Miharu (森みはる)
 * Ejima Aeri (江嶋綾恵梨)

Former

 * Shinohara Mikoto (篠原美琴) (Left March 2017)
 * Asakura Shion (亜桜しおん) (Graduated March 2018)
 * Daimon Karin (大門果琳) (Graduated October 12, 2019)

Mini Albums

 * 1) [2017.07.01] Heart Sunglasses (ハートサングラス)
 * 2) [2019.08.07] Churu Summer! (ちゅるサマ!)

Singles

 * 1) [2018.07.07] Chapuchapa (チャプチャパ)
 * 2) [2018.10.30] Snow Memory (スノウメモリー)

Songs
These songs aren't on any of the already known singles / mini albums.
 * [2016.12.01] Nijimasu Emotion (ニジマスエモーション)
 * [2017.05.20] Twilight (トワイライト)
 * [2017.10.15] Orange Days (オレンジデイズ)
 * [2018.05.06] Nanairo no Tsubomi (七色のツボミ)
 * [2019.10.26] Silk Hat Parade (シルクハットパレード)
 * [2020.01.31] Flash Back