Surviving on a Lost Island with a Spoiled Heiress

An exhausted corporate drone wakes up to find himself thrown into a survival life on an uninhabited island alone with a selfish young lady. Then a cool female president, a devoted fan girl, and even a beastman princess appear, and he gets excited thinking, "Is this my harem island?" But he is cornered by attacks from ferocious beasts, betrayal of friends, and pursuit by tribes, and realizes that he is the "best prey on the island" whose love and life are targeted.