Nazuna enrolls in the Ninth Boarding School and begins a new life with her three roommates. On the first night, out of curiosity, the three of them go exploring the campus and encounter a terrifying monster... Will Nazuna and her friends be able to graduate from this special school where students are not allowed to go outside for three years?!

When a family of three book passage on a luxury liner they soon realize that the glamours cruise ship is nothing but a facade as a series of mysterious killings spread throughout the ship. With the sea proving no escape, how will they survive?

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