He’d paid for the dinner (she said things were so awkward that all they did was eat), which he said was because he was her elder, and then asked her to buy him dinner next time. So the second time, they went to a barbecue restaurant — with their respective staffs in tow — and IU said he’d eaten so much (expensive) beef that frankly she’d been a bit worried about the cost, only to discover that he’d paid that time, too.