problem in spread progression between [Normal] and [Hard]:
[Normal] consist of mostly 2/1 and 1/1 rhythms while [Hard] uses 1/2 rhythms very extensively going up to 5-circle bursts very often (00:57:612 (4,5,6,7,8) - 01:00:265 (2,3,4,5,6) - for example). this leads to a spread gap between these two difficulties that is currently too large
[Hard] however leads nicely into the level of difficulty in [Insane] so I would not suggest nerfing [Hard] to solve this problem.
instead, I would recommend adding a new difficulty (for example [Advanced]) between [Normal] and [Hard] that introduces more dense 1/1 rhythm compared to [Normal]
romanised artist name should be Megurimeguru according to the artist's youtube and niconico profiles:
https://www.youtube.com/@MeguriMeguru_p
https://www.nicovideo.jp/user/125623185/video
bpm during the 1/3 section is wrong, and the final chorus' offset is over 40 ms early
more accurate timing
1286,408.163265306122,4,2,1,70,1,0
109857,415.22491349481,4,2,1,70,1,0
110687,418.118466898955,4,2,1,70,1,0
137028,428.571428571429,4,2,1,70,1,0
137456,408.163265306122,4,2,1,80,1,0