The Secret of the Upstairs Floor (NCT Haechan's Bingui Writing, Beomgyu X)
※Please note that this work has no connection to real people.
"My house is on the top floor...?"
A hotel and amusement park on the rooftop of my house that only appear at night?!
"Am I dead...?"
The various children I met there!
What's the upstairs area of my house like?
