In a key high school class, the peaceful life on campus was suddenly broken due to the addition of strangers. The midnight bell rang in the dark Dongcao grassland; the door panel of the old castle rang at three o'clock in the night; the new building appeared out of thin air on the campus in the early morning; the door suddenly appeared in the sewer, and the dark shadow passed by... All appeared in this ordinary school. But the students in school only care about immediate interests. As everyone knows, some dangers are approaching...
