Keppeki Shounen Kanzen Soubi

After a frightening experience three years earlier, Sata Senda becomes a boy obsessed with cleanliness. He carries antibacterial spray and wears a mask as standard equipment, while avoiding all close contact with others. As a result, he has no friends. When summer arrives in sixth grade, Sata is more or less forced to join a school trip. At the meeting place, he turns up completely covered in a protective suit.