Mitaiken HORIZON

Mitaiken HORIZON (未体験HORIZON) is Aqours's fourth single. It was released on September 25, 2019 on both CD and DVD/Blu-ray disc.

The song is written by Aki Hata, composed by Koutarou Odaka and UiNA and arranged by Koutarou Odaka.

CD

 * 1) Mitaiken HORIZON (未体験HORIZON)
 * 2) Deep Resonance
 * 3) Dance with Minotaurus
 * 4) Mitaiken HORIZON (Off Vocal) (未体験HORIZON (Off Vocal))
 * 5) Dokidoki! Mikan Saiban (どきどき！ みかん裁判)
 * 6) Shuugou! Himono Paatii (集合！ ひものパーティー)
 * 7) Tobikome! Numazu Jou (とびこめ！ ぬまづ城)

DVD/Blu-ray

 * 1) Mitaiken HORIZON (Animation PV) (未体験HORIZON (アニメPV))

Audio

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

Live Performances

 * January 18 & 19, 2020: Love Live! Fest

Notes & Trivia

 * This single release date coincides with Kanako Takatsuki, Hanamaru's seiyuu's birthday.

PV-based

 * At the beginning of the PV where the song plays, the background shifts from Kimi no Kokoro wa Kagayaiteru kai? to Koi ni Naritai AQUARIUM to HAPPY PARTY TRAIN (along with their respective centers) before it shifts into Mitaiken HORIZON's background.
 * This officially confirms that Kimi no Kokoro wa Kagayaiteru Kai? is centered by Chika and Riko.
 * The area where the girls are performing is based on Tama Zoological Park.
 * The PV had various callbacks on the Anime:
 * Yoshiko and Hanamaru's flashback in Yohane Descends.
 * Yoshiko and Hanamaru being present in the bookstore in Two Girls' Feelings.
 * Product Placement: In the PV, Riko Sakurauchi plays the Love Live! School idol festival ~after school ACTIVITY~  arcade game. The game's stage she's playing is Yume no Tobira.
 * While this happens, you can see Yoshimi, Mutsu and Itsuki, supporting characters from the Love Live! Sunshine!! series.
 * The clothes they are wearing are the same as the final of Love Live! Sunshine!! The School Idol Movie Over The Rainbow.