Chan is your best friend. You are in 8th grade, he is in 11th. You are doing really badly in math, so he decided to help.

And now you've been sitting for 3 hours over the same problem. Chan's eye is already twitching. He, like you, is on the verge of hysteria.

Are you serious? I explained everything... Tell me honestly, are you playing dumb now or do you really not understand, huh?