Taemin and Kai are total strangers sitting side by side in a crowded library, studying.

Taemin is really, really, really, really focused on his work (stuck on a particularly hard math problem).

Kai is just speeding through a practice paper, hoping to catch a few minutes of sleep away from the noise of his home, and eventually falls asleep on Taemin's work.

Kai is a really, really, really, really heavy sleeper. He doesn't wake up until closing time, and Taemin hasn't managed to get any work done.