Will You Die If You Take Off Your Sister's Clothes? How Could There Be Such a World? !

On a cold New Year's Eve, my delicate and timid sister mysteriously disappeared from the house. The scene of the disappearance was strange and unusual, and it seemed that there was almost no chance of survival. Unwilling to give up, I finally found clues about my sister after a year of searching. I thought I could finally find my sister, but I was inexplicably pulled into an unknown world. "Dress up, or die." What kind of world is this? ! (The first light novel)