Gunjou no Sekai

 (群青の世界), sometimes abbreviated to Aoseka (青セカ), is an idol group that debuted on December 23, 2018.

Current Members

 * Ichimiya Yui (一宮ゆい) (Founding Member)
 * Kudo Mika (工藤みか) (Founding Member)
 * Yokota Fumika (横田ふみか) (Founding Member)
 * Murasaki Yuna (村崎ゆうな) (Joined July 27, 2020)
 * Mizuno Mayu (水野まゆ) (Joined July 27, 2020)

Former Members

 * Nagase Rimi (長瀬りみ) (Graduated July 3, 2020)

Singles

 * 1) [2018.12.23] Unknown Planet (アンノウンプラネット)
 * 2) [2020.04.14] Aozora Moment (青空モーメント)

Digital Singles

 * 1) [2018.12.23] Unknown Planet (アンノウンプラネット)
 * 2) [2019.06.28] Tsuyogari na Seigi (強がりな正義)
 * 3) [2019.06.29] Mirai Silhouette (未来シルエット)
 * 4) [2019.07.01] Nonstop
 * 5) [2019.06.03] Quest
 * 6) [2019.06.03] Melodrama (メロドラマ)
 * 7) [2019.06.04] Gunjou Tamashii (群青魂)
 * 8) [2019.12.03] Coin Toss (コイントス)
 * 9) [2019.12.03] BLUE OVER
 * 10) [2019.12.03] Saishuushou no nai Story (最終章のないストーリー)
 * 11) [2019.12.19] Reiwa Anthem (令和アンセム)
 * 12) [2020.08.01] Aoi Hikari (青い光)
 * 13) [2020.08.26] Role Play (ロールプレイ)
 * 14) [2020.11.07] I Wanna Be (アイ・ワナ・ビー)