Based on an actual Hawaiian Themed Resort in Japan.

Hiwa is a young girl with a desire to follow her late older sister's footsteps into the world of Hula Dancing at a well known Hawaiian Resort, joined by a stuck up pro, a laid back Sumo lady, a shy girl and a Hawaiian native, Hiwa and her new found friends compete in contests and grow to become splendid hula dancers over the years of intense training.
You can instantly tell this was made by the Love Live crew with how the idol tropes manage to slip in, thankfully with the pacing, it doesn't become a nuisance and much of the charm of the film comes from the fact that this is based on an actual Hawaiian resort, my only real complaint is the talking doll, I won't spoil it but adding a supernatural element to an otherwise grounded in reality film does take you out of the immersion.
Not seen a dub should be decent though.
Final Verdict: A pleasant film obviously taking as many tropes from Love Live as possible but not stuffing your brain with the melodrama that usually comes with it, certainly worth your time.