As of 6/15/2017 10:00am JST, 朧 and 打打打打打打打打打打 receives Challenge charts that are unlockable under the EXTRA SAVIOR event in EXTRA STAGE.

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朧

Artist: HHH×MM×ST
Composition/Arrangement: Ryu☆, Starving Trancer
Lyrics: Dai.
Vocals: Mayumi Morinaga
BPM: 149
Length: 2:01

Single Challenge (13)

Double Challenge (14)

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打打打打打打打打打打

Artist: ヒゲドライバー join. SELEN
Composition/Arrangement/Lyrics: Hige Driver
Vocals: Selen Kusunoki
BPM: 156
Length: 1:44

Single Challenge (16)

Double Challenge (15)