The story starts when Tohoin Ikuto ran away from home because he had a fight with his father. His life-long dream was to board a ship, and so he boarded a cruise ship on the very same night. Suddenly, the ship was hit by a powerful storm while at sea. Ikuto was then thrown into the water and was not able to be saved. Ikuto woke up in an island where there are only girls that make up it's population. Being the only boy in the entire island, he was very popular with everyone. All the girls, except Suzu and Suzu's grandmother, were pressuring him to marry them.Ikuto didn't want to stay in the island and attempted to go out of it many times. Due to the whirlpools and even a tornado surrounding the island, no one would venture out. After realizing that he can not really leave the island, he then starts a new life in the island. Suzu's Grandmother, being the eldest in the island, decided that Ikuto will live with Suzu to take care of him. Suzu does her best to protect Ikuto from the masses and help him adjust in the island.