OFA☆21

 was an idol group formed by an adult video company. They were originally named OKB24.

Members

 * Rinka (梨杏)
 * Izumi Mana (泉麻那)
 * Maeda Hina (前田陽菜)
 * Kozakura Saki (小桜沙樹)
 * Ayane Sakura (彩音さくら)
 * Aozora Konatsu (青空小夏)
 * Hoshizaki Anri (星崎アンリ)
 * Asakura Kotomi (朝倉ことみ)
 * Naoshima Ai (直嶋あい)
 * Aoki Mana (蒼木マナ)
 * Tachibana Hinata (橘ひなた)
 * Hoshimiya Nao (星宮なお)
 * Ouka Eri (桜花えり)
 * Saotome Rui (早乙女ルイ)
 * Yoshida Hana (吉田花)
 * Asuka Mimi (あすかみみ)
 * Imai Kanon (今井かのん)
 * Hayasaka Airi (早坂愛梨)
 * Sena Ayumu (瀬名あゆむ)
 * Naruse Kokomi (成瀬心美)
 * Tsubaki Mahiru (椿まひる)
 * Suzuki Natsu (鈴木なつ)
 * Tsubomi (つぼみ)
 * Shizuku (しずく)
 * Hasegawa Shizuku (長谷川しずく)
 * Usano Hitomi (宇佐野瞳)
 * Nishina Momoka (仁科百華)
 * Shiroishi Chihiro (城石千愛)
 * Tomoda Ayaka (友田彩也香)
 * Nakano Anri (野中あんり)
 * Hasegawa Sena (長谷川聖那)
 * Marika (まりか)
 * Aiko (愛心)
 * Higashio Mako (東尾真子)
 * Arimura Chika (有村千佳)

Singles

 * [2011.04.27] LOVE☆LIMIT ~Sotsugyou Made no Countdown~ (LOVE☆LIMIT～卒業までのカウントダウン～)