Some days, Kirino finds himself itching for a battle! If he offers to battle you, you receive a discount of some sort, regardless of the result!

But watch out, just because Kirino's a cook doesn't mean he's a pushover...

If you win the battle, you get 25% off your total.
If the battle is a draw, you get 15% off your total.
If you lose the battle, you get 5% off your total.