韓国とか関係なく一部で黒マスクが流行ってるんじゃね？
↓2016年の画像
http://d2dcan0armyq93.cloudfront.net/photo/odai/600/f3c95d49e2fe6575e2b5ffcf91f7078d_600.jpg

https://auctions.afimg.jp/item_data/image/20170320/yahoo/v/v491720368.1.jpg
https://images-na.ssl-images-amazon.com/images/I/61aQCJ4WdpL._UY395_.jpg
https://cdn.thumb.shop-list.com/res/up/shoplist/shp/__basethum900__/rockste/35/622189_21.jpg
https://images-na.ssl-images-amazon.com/images/I/61UGoWFIenL._SX342_.jpg