Seung Gil absolutely cannot stand math at all whatsoever. He's never really been that good at it, and he couldn't quite get the hang of it.

But you wanna know who's fucking scary-good at math?

JJ.

Seung Gil fucking cannot take it. It irks him so much.

He explained once to Phichit that when he found out JJ was good at math, it felt similar to when someone like stabs you in the hand with a fork.