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.
as Jin-sung
as So-hee
as Hye-joo
as Yoon-ji
as Kyung-jin
as Se-on
as Dance Teacher
as Dance Class Junior
as Younger Dance Group Member
as Sculpture Club Member
as Radio DJ
as Jin-sung's Ballet Dance Double
