Are Fake People Scary? I Can Take One Bite of This Thing

This world is far from simple as normal people imagine. In addition to humans, on this planet, there are also rat people living in dense forests, snake people who prey on rat people, and zerg that live in the earth. For these types of aliens, fresh human brains are the most delicious food. Therefore, they do not hesitate to risk entering human territory, eat humans, change into their appearance, and continue to mingle in society. Collectively called pseudo-people. However, humans will not sit still and wait for death. They take advantage of the aliens' strong vitality to investigate those disguised aliens. They also use the characteristics of several aliens to create bionic mechas. For example, there is a defensive armor made of Zerg exoskeleton technology; a reconnaissance armor made of the powerful five senses of rat people; and an assassin armor made of snake-man neurotoxin. These warriors are unified under one organization - the Bureau of Paranormal Investigation The male protagonist, Yama, is very nervous at the moment because he traveled through time and became an owl that became a spirit and disguised himself as a high school student. It just so happens that today is the day when the Paranormal Investigation Bureau conducts a "spring cleaning" of the school's puppets. (Note: Please don't care about the species of owl.)