Promise (Yakusoku - 約束) is the 20th episode of THE iDOLM@STER anime series. It first aired on November 18, 2011.


Chihaya's tragic past is revealed in a magazine no thanks to Kuroi which reveals that Chihaya had a younger brother named Yū who died in car accident when she was eight but the magazine slanders her, suggesting the shocked Chihaya who was there did nothing and was heartless and was also responsible for her parents divorce. Chihaya reveals to Haruka that she became an idol to sing in memory of her late brother who loved her singing but because of the revelation of her past has traumatize her that she is unable to sing, Chihaya wants to leave 765 Pro studios. As the days past, Chihaya refuses to leave her apartment, much to everyone's worries. Haruka tries her best to help Chihaya but Chihaya scolds her for being a busybody. After receiving Yū's sketchbook by Chihaya's mother to give to Chihaya herself, Haruka asks the Producer if she's just a bother for trying to help everyone but he assures her she isn't as it was her enthusiasm that help him when he was down. After reading Yū's sketchbook, Haruka and Miki have an idea to help Chihaya. Everyone at 765 Pro wrote and sent a song for Chihaya about their feelings to her which they hope she would sing it at the 765 Pro Autumn concert and Yū's sketchbook which Haruka reveals that what made her brother happy wasn't her singing but seeing Chihaya smile. On the day of the Autumn concert, just when it looks like Chihaya won't make it for her part, Chihaya finally arrives much to everyone's relief. As the music to her song begins, Chihaya is still unable to sing until Haruka and the rest of the idols sing the song for her. With their help and seeing her past self and little brother, Chihaya is finally able to overcome her trauma and finish the song herself. As the crowd applause her, everyone cries with Chihaya in celebration.

Featured Song

Promise (song) by Chihaya Kisaragi, Haruka Amami, Iori Minase, Azusa Miura, Ami and Mami Futami, Yukiho Hagiwara, Hibiki Ganaha, Takane Shijou and Yayoi Takasuki.

Ending Theme

Promise (Yakusoku) by Chihaya Kisaragi (Asami Imai), Haruka Amami (Eriko Nakamura), Iori Minase (Rie Kugimiya), Azusa Miura, Ami and Mami Futami (Asami Shimoda), Yukiho Hagiwara, Hibiki Ganaha, Takane Shijou (Yumi Hara) and Yayoi Takasuki (Mayako Nigo).

Episode Guide

# Episode Title Airdate Watch Episode*
1 This Is Where the Girls Start July 8, 2011 Play
2 The Girls Start Preparing July 15, 2011 Play
3 Everything Starts With One Courageous Step July 22, 2011 Play
4 That Changes Who I Am July 29, 2011 Play
5 Spending Summer Vacation With Everyone August 5, 2011 Play
6 The Decision to Continue Forward August 12, 2011 Play
7 Things You Love, Things That Are Important August 19, 2011 Play
8 The Indirect Route to Happiness August 26, 2011 Play
9 Things You Can Do As Two September 2, 2011 Play
10 Moving Forward a Little Bit with Everyone September 9, 2011 Play
11 Hopes, Uncertainties, and Signs September 16, 2011 Play
12 A Goal with a One-Way Path September 23, 2011 Play
13 And So, the Girls Rise to the Shining Stage September 30, 2011 Play
14 The World that Began to Change! October 7, 2011 Play
15 Everyone Together, It's a Live Broadcast! A Live Broadcast! October 14, 2011 Play
16 How It Feels to be All Alone October 21, 2011 Play
17 Makoto, A True Prince October 28, 2011 Play
18 Lots of Everything November 4, 2011 Play
19 Like the Moon Hiding Between the Clouds November 11, 2011 Play
20 Promise November 18, 2011 Play
21 Like a Flower Blooming November 25, 2011 Play
22 On Christmas Eve December 2, 2011 Play
23 Me December 9, 2011 Play
24 Dream December 16, 2011 Play
25 Everyone Together! December 23, 2011 Play
Bonus The Story of 765PRO June 16, 2012
*Clicking play will take you to a stream of that episode on Crunchyroll

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