After a fight with his father, Ikuto Tohoin runs away from home. He gets on a ship bound for Okinawa, but falls overboard due to a huge thunderstorm. In an instant he is swallowed by the waves, and a disheartened Ikuto washes ashore on an island called Airantou.
Suzu, a girl from the island, finds him, slaps him and gives him CPR. Now saved, Ikuto is taken to the eldest woman on the island. She suggests Ikuto recover at Suzu’s house. Shortly after, he discovers Suzu’s parents are dead and she lives alone. Because he is bad with girls, Ikuto worries about living with one. Suddenly, Suzu barges into the bath! She doesn’t look at all embarrassed and even wants to scrub his back. Because of this strange situation, Ikuto gets a massive nosebleed. However, his suffering doesn’t end there.