Positive Monster

 (ポジティブモンスター), formerly known as Mori circle Idol Bu (森サークルアイドル部), is currently a five-member Japanese idol group originally formed with four members in August 2021.

They made their stage debut on November 2, 2021 @Ebisu CreAto.

Their name Positive Monster was announced on November 21, 2021.

They're produced by Mori Fuuka.

1st Generation

 * Hiiragi Mii (柊木みぃ; ) (Founding member) Hiatus
 * Hitotoki Sara (春夏秋冬サラ; ) (Founding member)
 * Amane Mikoto (海音みこと; ) (Founding member; graduating August 21, 2022 )

2nd Generation

 * Minami Natsumi (美波夏海; ) (Joined February 26, 2022 )

3rd Generation

 * Naito Rina (内藤里奈; ) (Joined April 27, 2022 )

1st Generation

 * Hanasaki Suzuno (花咲鈴乃; ) (Founding member; withdrew February 23, 2022 )

Digital Singles

 * 1) [2021.12.05] Positive Monster (ポジティブモンスター)