Student Number Zero

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出席番号0番

Io Sado is a second-year middle school student with a passion for the occult. One day she encounters a mysterious teenager known as "Number 0," who is present in the classroom but invisible to everyone else.

From that meeting on, Io has a supernatural experience: she shares a fun school life with Number 0 and ends up being pulled into another world where strange monsters appear.

As she goes through these experiences, Io begins to develop special feelings for Number 0.

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