Because of a frightening experience three years ago, schoolboy Sata Senda has become a compulsive cleanliness freak. As he carries anti-bacterial spray and a mask as standard equipment, and doesn’t allow any form of close contact, he has no friends.<br /><br />Now, in the summer of sixth grade, Sata has been forced to participate in the school trip. And so, he arrives at the departure point...completely covered in a protective suit?!