OS☆K

 is an idol group based in Nagoya. They are a sister unit of OS☆U. They debuted on September 23, 2021.

Current Members

 * Aoi Minato (蒼井湊)
 * Minami Miyuka (南みゆか)
 * Nanase Nana (七瀬なな)
 * Momose Hiyori (桃瀬ひより)
 * Yumeno Misaki (夢乃心咲)
 * Nishino Kokoro (西野心桜)
 * Matsunaga Aika (松永あいか)
 * Orihara Sakura (織原さくら)

Former Members

 * Ichinose Soraha (一之瀬天葉) (Withdrew October 29, 2021)
 * Tachibana Kyoka (橘杏佳) (Graduated March 18, 2022)
 * Usami Mii (宇佐美みい) (Graduated April 4, 2022)
 * Hano Kanon (羽乃花音) (Withdrew May 30, 2022)
 * Konatsu Yuana (小夏ゆあな) (Graduated June 4, 2022)
 * Izumo Yae (出雲やえ) (Transferred to OS☆U on June 4, 2022 ; Last live with OS☆K on June 9, 2022)
 * Ayase Hikaru (絢瀬ヒカル) (Joined March 5, 2022) (Transferred to OS☆U on June 4, 2022 ; Last live with OS☆K on June 9, 2022)