..... are they kids? No they are teens in highschool, one of them even has a beard... so they are all midgets or is that just how humans are?
Also can I point out something I continously find hilarious in most Asian works? The male protags are generic as hell and always looks the same with short hair, a pony tail, or very long hair and it's always black or brown, or blond if it's a fantasy... it's the same thing every time right? Well let's look at literally every other unique character in the work that just screams "main character".... the women always have colored hair, the villains look more likeable than the protag, and the actions of them are so forgettable that I find it a crime