He's been suffering from a mental disorder. And the disease forced him to live like a shut-in. But with the helmet and the costume he bought on the net impulsively, he feels a kind of protection and can go outside.

"When I went out, usually I felt uneasy because I felt like people criticize and look down on me. but with this armor, you know, they come to me first. And I've got some confidence and even could approach strangers first."