Leeseo: Did you bring lunch today?
Gaeul: Why are you asking that, am I supposed to eat your food?
Leeseo: Oh, looks like not everyone does that
Gaeul: Does what?
Flashback:
Leeseo: Woah! Why does your lunchbag looks so big?! You must've packed a good meal
Yujin: What? I just carry this around because it looks cool on me