(The setting of this story seems to be a mobile only setting.)
Old building(Hangul: 오래된 건물 ) is an exclusive document found in the Mobile version of White Day: A Labyrinth Named School (2009).
It details the instructions when the blackout happens.
Hey, Mr. Kim, Power outages occur because this school building is old.
In that case, you can turn on the lights by using the gloves in the cabinet of the Student Records Office.
여보게 김씨, 학교가 낡아서 정전이 되면 학적부실 캐비닛의 장갑을 사용해서 불을 켜주면 될 걸세.