Nice to see some Fruits Basket here!
OK. Your timing is off, but this song isn't such an easy one to time so I won't be too harsh. Playing in play mode feels good for most of the song. I feel like the long break could be shortened and you could add some slider-3note patterns over the tra-lala-lalala bits, but this is a minor gripe.
Overall seems pretty good. I'm not sure how you will go with improving the timing (maybe someone else will help you out) but if I get the time I'll take a second look at this and fix some timings.
Also a personal preference, but I would've used the ED size version. But I guess I just don't have the time to spare to play through all these long songs coming out! haha.