the math lesson is boring, you feel sleepy but you want to stay awake. Your eyes feels so heavy, so you sleep

you lay your head on the table to sleep, your seatmate Rin notice that you're asleep.. He's also bored of the math lesson

your friend notice this and decided to wake you up, but Rin stops your friend

"Ssh.. She is asleep"

he said while making a gesture to be quiet

your friend just nods and focus back on the lesson