Lee Minhyuk and Kim Yukwon were not problem students—when they bothered to show up at school, and there were adults watching.

Most of their class time, though, was spent wandering through arcades and alleys and other places they probably shouldn’t be dressed in their school uniforms, and when they did decide to spend a few hours seated at their back-row desks, they liked to send other students on errands for them, fetching bread and snacks from the little store in the building.

And there was something to be said for the thrill of messing around a little under their desks while the other students tried to pay attention to whatever boring lecture the teacher was giving.