@17

 is an idol group based out of the @Home Cafe chain of maid cafes. The group was originally active in August 2016 to participate in TOKYO IDOL FESTIVAL 2016, and released one single during these promotions. They stopped activities after the festival until August 2017, when they revived to participate in TOKYO IDOL FESTIVAL 2017. This time, they remained active as a full-time idol group.

Current Members

 * Kagetora (かげとら; ) (2nd Generation)
 * Chiroru (ちろる; ) (2nd Generation)
 * Koebi (こえび; ) (3rd Generation)
 * Tsurara (つらら; ) (3rd Generation)
 * Momona (ももな; ) (4th Generation)

Former Members

 * Mizukin (みづきん) (2016)
 * Kagami (かがみ) (2016)
 * Shachi (しゃち) (2016)
 * Kohaku (琥珀) (2016)
 * Amo (あも) (2016)
 * Monaka (もなか) (2016)
 * Sui (すぃ) (2016)
 * Reona (れおな) (2016)
 * Shijimi (しじみ) (2016)
 * Manbou (マンボウ) (2016)
 * Eri (えり) (2016)
 * Ichigo (いちご) (2016)
 * Rokiti (ろきてぃ) (2nd Generation, graduated February 2018)
 * Chimu (2016; 1st Generation, graduated May 19, 2018)
 * Tsukihi (つきひ) (2016; 1st Generation, graduated May 19, 2018)
 * Anri (あんり) (2nd Generation, graduated May 19, 2018)
 * Hatsune (はつね) (2nd Generation, graduated May 19, 2018)
 * Mozuku (もずく) (2nd Generation, graduated May 19, 2018)
 * Ruchia (るちあ) (2016; 1st Generation, graduated October 7, 2018)
 * Akarin (あかりん) (2016; 1st Generation, graduated April 13, 2019)
 * Kuroko (くろこ) (2016; 1st Generation, graduated April 13, 2019)
 * Aiku (あいく) (2nd Generation, graduated April 13, 2019)
 * Kanipan (かにぱん) (2nd Generation, graduated April 13, 2019)
 * Kurumi (くるみ) (2nd Generation, graduated April 13, 2019)
 * Nono (のの) (2nd Generation, graduated April 13, 2019)
 * Miu (みう) (2nd Generation, graduated April 13, 2019)
 * Yumena (ゆめな) (2nd Generation, graduated April 13, 2019)
 * Rame (らめ) (2nd Generation, graduated April 13, 2019)
 * Menma (めんま) (3rd Generation, graduated April 13, 2019)
 * Retasu (れたす) (3rd Generation, graduated April 13, 2019)
 * Kashima (かしま) (4th Generation, graduated September 30, 2020)
 * Minarin (みなりん) (2nd Generation, left October 22, 2020)
 * Ryon (りょん; ) (4th Generation, graduated July 2021)

Units

 * At Seventeen Otaku (あっとせぶんてぃーんオルタ) (Anri, Kuroko, Chiroru, Tsukihi, Hatsune, Rame, Rokiti)

Albums

 * [2019.04.03] At Seventeen (あっとせぶんてぃーん)

Singles

 * [2016.08.05] summer time / Ko・ko・ro Caramel (summer time/コ・コ・ロキャラメル)
 * [2017.08.04] Seventeen Parfait (セブンティーンパフェ
 * [2017.11.22] Bubble Bath Girl / Sugar*Sugar (バブルバスガール/シュガー*シュガー
 * [2018.04.25] Mainichi ga Jet Coaster / LOVE SONG wa Utawanai (毎日がジェットコースター/LOVE SONGは歌わない)
 * [2018.09.26] Natsu no Canaria (夏のカナリア)
 * [2019.09.04] Ribbon / Beginning / Butterfly Effect (リボン/Beginning/バタフライ・エフェクト)
 * [2020.02.19] Muteki na Egao (ムテキの笑顔)
 * [2020.09.23] Hanahana Hanabi (はなはなはなび)