Monster High-Rise

I got on the wrong elevator and was taken into a strange "tall building" full of monsters. Where is this place, why am I here, how do I leave here and return to the ordinary and busy daily life? I have to get back alive. "Monster Tower" can disclose information: 1. The higher the floor number, the stronger the monster. 2. Almost all monsters in monster towers are full of appetite for humans. 3. Monsters will kill each other. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.