Classroom Master Key or Main Building 1 Master Key is an item in White Day: A Labyrinth Named School and Remake.


This key is needed to open the most of the locked classrooms & Rooms in the Main Building, Section 1.


In the Original, It is found on the Main Office's Door frame of the Student Records Office side, Main Building, Section 1.
In the Remake, So-young drop that Key to the floor when the Tree capture the So-young.

Further Notes


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