I'm good at it. It's actually chemistry, but I guess that makes me good at math by default.

[Hayato crawls out of his closet, a pair of plain, underused flip-flops in hand. He makes his way over to his table where Sayu is standing... and cringes a bit when she asks what the stuff's for. He sighes]

I told ya, I'm a thug. You really want to know?