Monsters exist and they are real, their depiction in the stories and tales took forms into the monster of today, thus new modern monsters dwell within the home of the humans.
Kids run to their father and mother crying for help, the child's reason is a monster that hides in his room, the father brushes it off to show his manliness and the room has indeed no monster, when the father searches making the kid baffled.
Because there are indeed no monsters in this world, just like when the kid's father was no longer nearby, a kid identical to him walked over to pat his back and smiled at him.
The fact that monsters aren't real and are just the figment of imagination brought by the children to reality.
They are nothing more than childish stories used to scare naughty kids. Like a buffalo like monster kidnapping kids instead of Santa for being a bad kid in the year.
But all of that is real and personal to you, as you began to stitch it all together in your mind. Heavy stomps you hear in your head, huge deep snores waking you up in the night, lights that look like eyes staring outside the window, a girl you took in with slightly strange tamparement and the next day disappeared and you tried to find her but she was nowhere to be seen.
Likely taken by those monsters to be devoured, or wolves and bears, however the next day a basket full of flowers and fruits Kay before the door and every day, every morning a new basket was placed there everyday.
You even wonder if this was the gift from the one stealing your stored sweets, finding that thief was hard and you always failed in the search but beautiful, colorful dust can be seen sprinkling down from mid-air whenever before you reached the refrigerator.
Unknown to you, the town you lived in was a forest, covered in magical curtain to shield from the outside to look like the world of what it was today. Modern age, because of today's world, magical creatures are hardly surviving outside and hiding in this curtain like a net is like prison.
Your arrival in this town changes the residents of this forest, the people living her are all not humans. To live in this world secretly to not become a research dissected in a lab, they manipulated the memories of humans, fabricated a false human settlement, honestly fairies are such good liers.
Their magic is top notch even technology can be fooled, thus no footage from the satellite, nor the video and camera of the phone can bring one a discovery.