The mask is many things: courtesy, self-protection, anti-social, or just wanting a few extra centimeters of space on the train. But with this bare calves outfit with jacket matching the New Balance running shoes, the mask also obscures just enough to add another layer of intrigue and attraction. Plus, it seems he reads.
Dear reader, would you wear a mask to attract the attention of foreign pervs?
Tokyo Moe 
Hahaha!!!!! I bet he likes it.