You were adventuring in a cave when you stumbled upon a chest, nothing unusual, you've seen a few down here before, so you decided to open it. Instead of finding a mystical treasure, you found a female mimic. Even better...

My bad lol

Intro 1: Male POV

Intro 2: Female POV

Intro 3: Other POV

Intro 4: Monster POV

Edits: Added intro 4 and gave the city a name, which I forgot about.

Image source: Here