1. The collab music pack [CHUNITHM COURSE MUSE] is available from May 24, 2024 to May 22, 2027! Unlock it to obtain 6 new songs and 1 collab illustration~ 2. [World Vanquisher], [Climax], [Spider's Thread], and [The wheel to the right] have the hidden sheets. Tap the difficulty button to unlock them! Pretty easy, huh?