Straight to video horror/comedy directed by Minoru Kawasaki

Beautiful girls are in danger. At Sunny Beach, a huge shark is waiting for his prey. College students Miki and Mai arrive on a private beach on a tropical island. They can't find the hotel where they booked their reservations, and have gotten hopelessly lost, until a handsome young man shows up, offering to take them to his lodge. But something is not right about the place. The owner's fingernails are tainted with blood and Miki feels something sinister lurking nearby.