Caught with a severe fever before his school trip, Tobio Ikuse, a second-year high school student was forced to miss out his school trip with his schoolmates on a luxury liner. Four days later, the news about the disappearance of the teachers and second-year students reaches Tobio's ears.

Few months after the incident, Tobio having slowly recovered from the shock accidentally encounters one of his classmates again.

Due to lack of popularity, only one volume was released before the series was cancelled.