Unknown Creatures in the World

In this world, there are many creatures unknown to humans. They have been discovered by a few people but have not been confirmed to exist. They are called unconfirmed organisms. In the sightings of these unknown organisms, they are often described as a combination of existing animals, or as a huge and terrifying creature like those from prehistoric times. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.