Kaito knew Hakuba was right, and he couldn't help but feel terribly guilty that his best friend was wasting her time on him. He chuckled a bit more to himself, not even bothering to brush his dark bangs from his eyes, before muttering somewhat fondly to himself, "Idiot girl..."

His head shot up again, his expression once again defaulting to poker face, once Hakuba mentioned this 'list.' So he wanted to play the hypothetical game, did he? Kaito was walking on thin ice, one slip meant he would be spilling his entire secret to Hakuba. He'd have to tread carefully. He hesitated for a bit, but continued slowly, "Hypothetically speaking of course, how did you create such a list, if you aren't even sure what kind of gem Kaitou Kid is hypothetically looking for?"