Aikawa Kazuki is a university lecturer who teaches ethology, which is the study of animal behaviour. He has just started work as a lecturer at the recommendation of Professor Samejima Shun whom he studied under back in university. Unfortunately, when it comes to the animals and living things that Kazuki loves, he gets so immersed that he pays no attention to other things. He is not able to follow the rules established by the university and gets scolded at work every day. In addition, he has the habit of procrastinating on things that he finds bothersome and is also poor at being punctual. Kazuki’s university lectures are also not ordinary. Although he gives students assignments to make them express their opinions, he would end up saying that he does not know the right answer either and stump them. Kazuki’s behaviour bewilders the people around him, and at times, it even irritates them. They keep this “eccentric” at a slight distance but this does not perturb him. However, their own values are shaken by the sight of Kazuki, who has no bias or preconceived ideas and enjoys each day following his interests and curiosity, and they are gradually influenced by him.