The protagonist of the hentai Fujigasaki Miho lives with her father in a small town by the ocean. Several years ago she lost her mother in an accident, who worked as an oceanologist for a long time. Her father was the captain of the cruise ship Northern Lights, but he retired after losing his wife. Of course Miho had seen and noticed more than once that her father really wanted to get back on the ship to his favorite job, but couldn't because of the daily obligations. She took over all the chores and pushed her father into action, and he didn't resist and decided to return to the job he loved after all. Together with her friend Jun Moribe, Miho took a job on a liner as a part-time employee and set out on her first sea voyage. However, she had no idea what kind of nightmare awaited her...