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?