Quite difficult for a 9. Moreover, it is one of the hardest future level 9 song with chart constant of 10.0. Some say it rivals even 9+ songs.
The strings of 6 sky notes in the first part of the song begin on the off-beat. They also move slightly to the side. If you grasp these two things, you won't lose as many notes, or get chains of FAR timings.
The arc note after the acceleration ends is easy to miss, but thankfully if you recover right away you won't drop your combo.
Depending on the case, you can get the note streams by alternating hands (with one exception). However, you'll need to have fingers crossing over often. Be especially careful of the arc note colors during the big refrain.