What you have is a picture of a Coplayer who it at a Conbini, grabbing something to eat. It is called Cosplay for a reason. Cosplay is short for Costume Play.

Then you ask if people would wear this – but not as a costume. Ok – do you really think this kid goes like this to school, or work, or hangs out like this at home? Most Japanese kids have to sneak out and change at the train station bathroom and utilize the lockers to store their normal clothing to hide it from their parents. For the high schoolers it can be really dangerous – if they are featured in a magazine they can get kicked out of school because it is against school rules.

PS – Look up DJ Sisen if you want to know what inspired this costume.