Kimi no Kokoro wa Kagayaiteru kai?

Kimi no Kokoro wa Kagayaiteru kai? (君のこころは輝いてるかい？) is Aqours's first single, released on October 7, 2015 on both CD and DVD/Blu-ray disc. It is also featured in the anime in Season 2 Episode 3.

The song is written by Aki Hata, composed by Hajime Mitsumasu and arranged by EFFY.

CD

 * 1) Kimi no Kokoro wa Kagayaiteru kai? (君のこころは輝いてるかい？)
 * 2) Step! ZERO to ONE
 * 3) Aqours☆HEROES
 * 4) Kimi no Kokoro wa Kagayaiteru kai? (Off Vocal)
 * 5) Greetings from Takami Chika
 * 6) Greetings from Sakurauchi Riko
 * 7) Greetings from Matsuura Kanan
 * 8) Greetings from Kurosawa Dia
 * 9) Greetings from Watanabe You
 * 10) Greetings from Tsushima Yoshiko
 * 11) Greetings from Kunikida Hanamaru
 * 12) Greetings from Ohara Mari
 * 13) Greetings from Kurosawa Ruby

DVD/Blu-ray

 * 1) Kimi no Kokoro wa Kagayaiteru kai? (Animation PV) (君のこころは輝いてるかい？(アニメPV))

Audio

 * Does not work on iPad, or any medium that does not support the .ogg audio format.

Live Performances

 * January 11, 2016: Aqours Special Extracurricular Activities: Is Everyone Ready? ~One, Two, Sunshine!!~
 * July 31, 2016: Aqours Summer Holidays Extracurricular Activities: ~Summer Festival With Everyone~ in Numazu
 * December 27, 2016: Aqours Winter Holidays Extracurricular Activities: ~Shan-shan With Everyone♪ Aqours Mini Live 2016♪~
 * February 25 & 26, 2017: Aqours First Love Live! ~Step! ZERO to ONE~
 * May 13, 2017: ANiUTa LIVE 2017 "Aniupa!!"
 * June 30, 2017: Anisong World Matsuri ~Japan Kawaii Live~
 * July 22, 2017: Bilibili Macro Link-Star phase×Anison World Matsuri 2017
 * Aqours 2nd Love Live! HAPPY PARTY TRAIN TOUR
 * Nagoya: August 5 & 6, 2017
 * Kobe: August 19 & 20, 2017
 * Saitama: September 29 & 30, 2017

Trivia

 * The outro and the sub-intro of this song resembles the outro of the μ's single, "Bokura wa Ima no Naka de", and the sub-intro of "Sore wa Bokutachi no Kiseki".
 * This was the first (but not only) song in the entire Love Live! franchise to have exactly two centers.
 * The single sold 17500 copies on day 1, 48477 copies within the first week and 81115 copies overall.

Reference
君のこころは輝いてるかい?