I forgot mundane Halloween costumes are a thing in Japan. 😆
The tradition was started in 2014 by a group of adults at Daily Portal Z who kind of wanted to participate in the festivities of Halloween, but were too embarrassed to go all out in witch or zombie costumes. So instead of the flashy and flamboyant costumes they had been seeing gain popularity in Japan, they decided to dress up in mundane, everyday costumes.
via kottke.org