Island

An island far from the mainland is Urashima. There, residents enjoy carefree lives. But five years ago, the three distinguished families of the island met with a string of catastrophes and gave in to suspicion. The island's inhabitants severed all ties with the mainland and started to slowly deteriorate. Three girls who are members of the three families have the secret to preserving the island. However, they are conflicted and constrained by dated customs. A lone man comes ashore on that island. The man starts a lone battle to alter the destiny of the island after claiming to be from the future.