Sowon: what's that?
Yuju: books.
Sowon: where did you borrow those?
Yuju: i bought it. It's 50% discount.
Sowon: oh, that's great. [helps yuju carrying the books]
Yuju: thank you.
Sowon: why are these books the same?
Yuju: i bought 2 books so I can get 100% discount.
Sowon: wow. That's so smart of y---
Yuju: ^_^)
Sowon: ---wait what
