A staircase leading to a schoolgirls' dormitory usually has 28 steps, but sometimes a 29th step appears. Any wish you make while standing on this step comes true, even if it must come true in the most horrific way possible.
1972
1990
—
1988
2018
2008
2014
1998
2002
2021
2010
2016
1987
2012
2001
2015