Up to the nines

 is sung by Tenn Kujo's voice actor, Soma Saito. The song lyrics are written by, and the song is composed and arranged by.

 is part of the 12 SONGS GIFT project where, in 2018, all 12 idols from IDOLiSH7, TRIGGER, and Re:vale will be releasing solo songs on their birthdays.

 can be purchased digitally on the iTunes Store, animelo mix, music.jp, mora, and Recochoku (レコチョク).  was also released within the game on July 9, 2018, Tenn Kujo's birthday. If you clear Part 1 Chapter 1.6 it will be available within the normal lives.

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