Leeseo: Unnie, do you know what a group of crows are?

Yujin: No?

Leeseo: It's called a "murder". How about a group of ravens?

Yujin: I don't know?

Leeseo: Its called "unkindness"

Yujin: Okay my turn, do you know what you're doing?

Leeseo: Talking to you ?

Yujin: No, you're ruining my day.