>>44019
It looks like a band playing an event for Soldiers(hardly rare), it's Pop music too and they are Korean(so not Japanese Id*l Otaku). Such western Pop music is not really a part of Otaku culture, though technically one can be an Otaku about anything. It's kind of like the western word nerd, it has connotations to a subcultre but at the same time one does not have to be part of that subculture to be a nerd, you could have Bird Nerds or Industrial Capacity of the Ottoman Empire Nerds or even sport nerds.